Find My Phone Automation

Using Home Assistant with the companion app on your phone. Home Assistant server must be able to reach the phone via network (VPN, Public Domain, Local Network)

Start Ringing

This can be copied into GUI when creating automation

 - service: notify.mobile_app_pixel_5
    data:
      message: Home Assistant
      title: Home Assistant is finding your phone!
      data:
        ttl: 0
        priority: high
        channel: alarm_stream
        tag: find-me
    alias: Phone alarm rings on highest priority

Stop ringing

- service: notify.mobile_app_pixel_5
    data:
      message: clear_notification
      data:
        tag: find-me
    alias: Clear past notifications

Bypass Mute Silence with text to speech

Using text to speech instead of Notification sound bypasses your phone's muted / silenced ringer

alias: Find My Phone
action: notify.mobile_app_ANDROIDPHONENAME
data:
  message: TTS
  data:
    tag: find-me
    ttl: 0
    priority: high
    importance: high
    media_stream: alarm_stream_max
    tts_text: Here I Am

Credit