core/homeassistant/components/linkplay/icons.json

{
  "entity": {
    "button": {
      "timesync": {
        "default": "mdi:clock"
      }
    },
    "select": {
      "audio_output_hardware_mode": {
        "default": "mdi:transit-connection-horizontal"
      }
    }
  },
  "services": {
    "play_preset": {
      "service": "mdi:play-box-outline"
    }
  }
}