core/homeassistant/components/lawn_mower/icons.json

{
  "entity_component": {
    "_": {
      "default": "mdi:robot-mower"
    }
  },
  "services": {
    "dock": "mdi:home-import-outline",
    "pause": "mdi:pause",
    "start_mowing": "mdi:play"
  }
}