diff --git a/homeassistant/components/mqtt/__init__.py b/homeassistant/components/mqtt/__init__.py
index 315f116ed92..c14266e296f 100644
--- a/homeassistant/components/mqtt/__init__.py
+++ b/homeassistant/components/mqtt/__init__.py
@@ -30,6 +30,7 @@ from homeassistant.helpers import (
 )
 from homeassistant.helpers.device_registry import DeviceEntry
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.entity_platform import async_get_platforms
 from homeassistant.helpers.reload import (
     async_integration_yaml_config,
     async_reload_integration_platforms,
@@ -75,7 +76,7 @@ from .const import (  # noqa: F401
     PLATFORMS,
     RELOADABLE_PLATFORMS,
 )
-from .mixins import MqttData, async_discover_yaml_entities
+from .mixins import MqttData
 from .models import (  # noqa: F401
     MqttCommandTemplate,
     MqttValueTemplate,
@@ -422,13 +423,25 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
             await async_reload_integration_platforms(hass, DOMAIN, RELOADABLE_PLATFORMS)
 
             # Reload the modern yaml platforms
+            mqtt_platforms = async_get_platforms(hass, DOMAIN)
+            tasks = [
+                entity.async_remove()
+                for mqtt_platform in mqtt_platforms
+                for entity in mqtt_platform.entities.values()
+                if not entity._discovery_data  # type: ignore[attr-defined] # pylint: disable=protected-access
+                if mqtt_platform.config_entry
+                and mqtt_platform.domain in RELOADABLE_PLATFORMS
+            ]
+            await asyncio.gather(*tasks)
+
             config_yaml = await async_integration_yaml_config(hass, DOMAIN) or {}
             mqtt_data.updated_config = config_yaml.get(DOMAIN, {})
             await asyncio.gather(
                 *(
                     [
-                        async_discover_yaml_entities(hass, component)
+                        mqtt_data.reload_handlers[component]()
                         for component in RELOADABLE_PLATFORMS
+                        if component in mqtt_data.reload_handlers
                     ]
                 )
             )
diff --git a/homeassistant/components/mqtt/alarm_control_panel.py b/homeassistant/components/mqtt/alarm_control_panel.py
index cf7262f9468..c3502cd8e64 100644
--- a/homeassistant/components/mqtt/alarm_control_panel.py
+++ b/homeassistant/components/mqtt/alarm_control_panel.py
@@ -44,7 +44,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -146,9 +145,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT alarm control panel through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, alarm.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/binary_sensor.py b/homeassistant/components/mqtt/binary_sensor.py
index adb4c12daf9..f0e5ecc9df8 100644
--- a/homeassistant/components/mqtt/binary_sensor.py
+++ b/homeassistant/components/mqtt/binary_sensor.py
@@ -42,7 +42,6 @@ from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttAvailability,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -102,9 +101,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT binary sensor through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, binary_sensor.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/button.py b/homeassistant/components/mqtt/button.py
index 0881b963b04..a14bf87c3be 100644
--- a/homeassistant/components/mqtt/button.py
+++ b/homeassistant/components/mqtt/button.py
@@ -25,7 +25,6 @@ from .const import (
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -81,9 +80,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT button through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, button.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/camera.py b/homeassistant/components/mqtt/camera.py
index 61c87e86888..f6039251882 100644
--- a/homeassistant/components/mqtt/camera.py
+++ b/homeassistant/components/mqtt/camera.py
@@ -23,7 +23,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -105,9 +104,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT camera through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, camera.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/climate.py b/homeassistant/components/mqtt/climate.py
index 3f0f8a89b3e..96c7ca3665b 100644
--- a/homeassistant/components/mqtt/climate.py
+++ b/homeassistant/components/mqtt/climate.py
@@ -50,7 +50,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -350,9 +349,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT climate device through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, climate.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/cover.py b/homeassistant/components/mqtt/cover.py
index fd96fe524d9..1f5d26c3a78 100644
--- a/homeassistant/components/mqtt/cover.py
+++ b/homeassistant/components/mqtt/cover.py
@@ -46,7 +46,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -242,9 +241,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT cover through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, cover.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/fan.py b/homeassistant/components/mqtt/fan.py
index fab748d2bfc..584df08e7d7 100644
--- a/homeassistant/components/mqtt/fan.py
+++ b/homeassistant/components/mqtt/fan.py
@@ -50,7 +50,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -241,9 +240,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT fan through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, fan.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/humidifier.py b/homeassistant/components/mqtt/humidifier.py
index 3a1271ea2c9..837bbb8b909 100644
--- a/homeassistant/components/mqtt/humidifier.py
+++ b/homeassistant/components/mqtt/humidifier.py
@@ -46,7 +46,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -187,9 +186,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT humidifier through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, humidifier.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/light/__init__.py b/homeassistant/components/mqtt/light/__init__.py
index 76c2980e63b..b7d52919d5e 100644
--- a/homeassistant/components/mqtt/light/__init__.py
+++ b/homeassistant/components/mqtt/light/__init__.py
@@ -14,7 +14,6 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from ..mixins import (
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -111,9 +110,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT lights configured under the light platform key (deprecated)."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, light.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/lock.py b/homeassistant/components/mqtt/lock.py
index 4910eafae75..dca02f909dc 100644
--- a/homeassistant/components/mqtt/lock.py
+++ b/homeassistant/components/mqtt/lock.py
@@ -28,7 +28,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -102,9 +101,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT lock through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, lock.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/mixins.py b/homeassistant/components/mqtt/mixins.py
index a16394667d8..477be399e26 100644
--- a/homeassistant/components/mqtt/mixins.py
+++ b/homeassistant/components/mqtt/mixins.py
@@ -39,7 +39,6 @@ from homeassistant.core import (
 from homeassistant.helpers import (
     config_validation as cv,
     device_registry as dr,
-    discovery,
     entity_registry as er,
 )
 from homeassistant.helpers.device_registry import EVENT_DEVICE_REGISTRY_UPDATED
@@ -286,6 +285,9 @@ class MqttData:
     last_discovery: float = 0.0
     reload_dispatchers: list[CALLBACK_TYPE] = field(default_factory=list)
     reload_entry: bool = False
+    reload_handlers: dict[str, Callable[[], Coroutine[Any, Any, None]]] = field(
+        default_factory=dict
+    )
     reload_needed: bool = False
     subscriptions_to_restore: list[Subscription] = field(default_factory=list)
     updated_config: ConfigType = field(default_factory=dict)
@@ -305,30 +307,6 @@ class SetupEntity(Protocol):
         """Define setup_entities type."""
 
 
-async def async_discover_yaml_entities(
-    hass: HomeAssistant, platform_domain: str
-) -> None:
-    """Discover entities for a platform."""
-    mqtt_data: MqttData = hass.data[DATA_MQTT]
-    if mqtt_data.updated_config:
-        # The platform has been reloaded
-        config_yaml = mqtt_data.updated_config
-    else:
-        config_yaml = mqtt_data.config or {}
-    if not config_yaml:
-        return
-    if platform_domain not in config_yaml:
-        return
-    await asyncio.gather(
-        *(
-            discovery.async_load_platform(hass, platform_domain, DOMAIN, config, {})
-            for config in await async_get_platform_config_from_yaml(
-                hass, platform_domain, config_yaml
-            )
-        )
-    )
-
-
 async def async_get_platform_config_from_yaml(
     hass: HomeAssistant,
     platform_domain: str,
@@ -350,7 +328,7 @@ async def async_setup_entry_helper(
     hass: HomeAssistant,
     domain: str,
     async_setup: partial[Coroutine[HomeAssistant, str, None]],
-    schema: vol.Schema,
+    discovery_schema: vol.Schema,
 ) -> None:
     """Set up entity, automation or tag creation dynamically through MQTT discovery."""
     mqtt_data: MqttData = hass.data[DATA_MQTT]
@@ -367,7 +345,7 @@ async def async_setup_entry_helper(
             return
         discovery_data = discovery_payload.discovery_data
         try:
-            config = schema(discovery_payload)
+            config = discovery_schema(discovery_payload)
             await async_setup(config, discovery_data=discovery_data)
         except Exception:
             discovery_hash = discovery_data[ATTR_DISCOVERY_HASH]
@@ -383,6 +361,31 @@ async def async_setup_entry_helper(
         )
     )
 
+    async def _async_setup_entities() -> None:
+        """Set up MQTT items from configuration.yaml."""
+        mqtt_data: MqttData = hass.data[DATA_MQTT]
+        if mqtt_data.updated_config:
+            # The platform has been reloaded
+            config_yaml = mqtt_data.updated_config
+        else:
+            config_yaml = mqtt_data.config or {}
+        if not config_yaml:
+            return
+        if domain not in config_yaml:
+            return
+        await asyncio.gather(
+            *[
+                async_setup(config)
+                for config in await async_get_platform_config_from_yaml(
+                    hass, domain, config_yaml
+                )
+            ]
+        )
+
+    # discover manual configured MQTT items
+    mqtt_data.reload_handlers[domain] = _async_setup_entities
+    await _async_setup_entities()
+
 
 async def async_setup_platform_helper(
     hass: HomeAssistant,
diff --git a/homeassistant/components/mqtt/number.py b/homeassistant/components/mqtt/number.py
index eeac406f668..09f9d122b98 100644
--- a/homeassistant/components/mqtt/number.py
+++ b/homeassistant/components/mqtt/number.py
@@ -44,7 +44,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -138,9 +137,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT number through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, number.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/scene.py b/homeassistant/components/mqtt/scene.py
index 70a4cad7f37..e237d70e903 100644
--- a/homeassistant/components/mqtt/scene.py
+++ b/homeassistant/components/mqtt/scene.py
@@ -23,7 +23,6 @@ from .mixins import (
     CONF_OBJECT_ID,
     MQTT_AVAILABILITY_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -79,9 +78,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT scene through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, scene.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/select.py b/homeassistant/components/mqtt/select.py
index ec88b1732d4..a6de0495690 100644
--- a/homeassistant/components/mqtt/select.py
+++ b/homeassistant/components/mqtt/select.py
@@ -30,7 +30,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -93,9 +92,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT select through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, select.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/sensor.py b/homeassistant/components/mqtt/sensor.py
index b361ce06a81..7c98fdf51b7 100644
--- a/homeassistant/components/mqtt/sensor.py
+++ b/homeassistant/components/mqtt/sensor.py
@@ -1,7 +1,7 @@
 """Support for MQTT sensors."""
 from __future__ import annotations
 
-from datetime import timedelta
+from datetime import datetime, timedelta
 import functools
 import logging
 
@@ -30,7 +30,7 @@ from homeassistant.core import HomeAssistant, callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.event import async_track_point_in_utc_time
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, StateType
 from homeassistant.util import dt as dt_util
 
 from . import subscription
@@ -41,7 +41,6 @@ from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttAvailability,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -146,9 +145,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT sensor through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, sensor.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
@@ -347,12 +343,12 @@ class MqttSensor(MqttEntity, RestoreSensor):
         self.async_write_ha_state()
 
     @property
-    def native_unit_of_measurement(self):
+    def native_unit_of_measurement(self) -> str | None:
         """Return the unit this state is expressed in."""
         return self._config.get(CONF_UNIT_OF_MEASUREMENT)
 
     @property
-    def native_value(self):
+    def native_value(self) -> StateType | datetime:
         """Return the state of the entity."""
         return self._state
 
diff --git a/homeassistant/components/mqtt/siren.py b/homeassistant/components/mqtt/siren.py
index 1f5111a5499..c8332046092 100644
--- a/homeassistant/components/mqtt/siren.py
+++ b/homeassistant/components/mqtt/siren.py
@@ -49,7 +49,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -140,9 +139,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT siren through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, siren.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/switch.py b/homeassistant/components/mqtt/switch.py
index b5c7ab13dfc..af16b14bea1 100644
--- a/homeassistant/components/mqtt/switch.py
+++ b/homeassistant/components/mqtt/switch.py
@@ -42,7 +42,6 @@ from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttEntity,
-    async_discover_yaml_entities,
     async_setup_entry_helper,
     async_setup_platform_helper,
     warn_for_legacy_schema,
@@ -101,9 +100,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT switch through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, switch.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/homeassistant/components/mqtt/vacuum/__init__.py b/homeassistant/components/mqtt/vacuum/__init__.py
index cdd14e6d8e3..abab55c632c 100644
--- a/homeassistant/components/mqtt/vacuum/__init__.py
+++ b/homeassistant/components/mqtt/vacuum/__init__.py
@@ -11,11 +11,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
-from ..mixins import (
-    async_discover_yaml_entities,
-    async_setup_entry_helper,
-    async_setup_platform_helper,
-)
+from ..mixins import async_setup_entry_helper, async_setup_platform_helper
 from .schema import CONF_SCHEMA, LEGACY, MQTT_VACUUM_SCHEMA, STATE
 from .schema_legacy import (
     DISCOVERY_SCHEMA_LEGACY,
@@ -90,9 +86,6 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT vacuum through configuration.yaml and dynamically through MQTT discovery."""
-    # load and initialize platform config from configuration.yaml
-    await async_discover_yaml_entities(hass, vacuum.DOMAIN)
-    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/tests/components/mqtt/test_init.py b/tests/components/mqtt/test_init.py
index 46649bf703f..90df45b65a1 100644
--- a/tests/components/mqtt/test_init.py
+++ b/tests/components/mqtt/test_init.py
@@ -29,11 +29,13 @@ from homeassistant.core import CoreState, HomeAssistant, callback
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import device_registry as dr, template
 from homeassistant.helpers.entity import Entity
+from homeassistant.helpers.entity_platform import async_get_platforms
 from homeassistant.setup import async_setup_component
 from homeassistant.util.dt import utcnow
 
 from .test_common import (
     help_test_entry_reload_with_new_config,
+    help_test_reload_with_config,
     help_test_setup_manual_entity_from_yaml,
 )
 
@@ -2986,3 +2988,68 @@ async def test_remove_unknown_conf_entry_options(hass, mqtt_client_mock, caplog)
         "MQTT config entry: {'protocol'}. Add them to configuration.yaml if they "
         "are needed"
     ) in caplog.text
+
+
+@patch("homeassistant.components.mqtt.PLATFORMS", [Platform.LIGHT])
+async def test_link_config_entry(hass, tmp_path, caplog):
+    """Test manual and dynamically setup entities are linked to the config entry."""
+    config_manual = {
+        "mqtt": {
+            "light": [
+                {
+                    "name": "test_manual",
+                    "unique_id": "test_manual_unique_id123",
+                    "command_topic": "test-topic_manual",
+                }
+            ]
+        }
+    }
+    config_discovery = {
+        "name": "test_discovery",
+        "unique_id": "test_discovery_unique456",
+        "command_topic": "test-topic_discovery",
+    }
+
+    # set up manual item
+    await help_test_setup_manual_entity_from_yaml(hass, config_manual)
+
+    # set up item through discovery
+    async_fire_mqtt_message(
+        hass, "homeassistant/light/bla/config", json.dumps(config_discovery)
+    )
+    await hass.async_block_till_done()
+
+    assert hass.states.get("light.test_manual") is not None
+    assert hass.states.get("light.test_discovery") is not None
+    entity_names = ["test_manual", "test_discovery"]
+
+    # Check if both entities were linked to the MQTT config entry
+    mqtt_config_entry = hass.config_entries.async_entries(mqtt.DOMAIN)[0]
+    mqtt_platforms = async_get_platforms(hass, mqtt.DOMAIN)
+
+    def _check_entities():
+        entities = []
+        for mqtt_platform in mqtt_platforms:
+            assert mqtt_platform.config_entry is mqtt_config_entry
+            entities += (entity for entity in mqtt_platform.entities.values())
+
+        for entity in entities:
+            assert entity.name in entity_names
+        return len(entities)
+
+    assert _check_entities() == 2
+
+    # reload entry and assert again
+    await help_test_entry_reload_with_new_config(hass, tmp_path, config_manual)
+    # manual set up item should remain
+    assert _check_entities() == 1
+    # set up item through discovery
+    async_fire_mqtt_message(
+        hass, "homeassistant/light/bla/config", json.dumps(config_discovery)
+    )
+    await hass.async_block_till_done()
+    assert _check_entities() == 2
+
+    # reload manual configured items and assert again
+    await help_test_reload_with_config(hass, caplog, tmp_path, config_manual)
+    assert _check_entities() == 2