Notifications not displayed on Android Auto

I am having problems getting HA notifications to appear on my Android Auto unit (Carpuride W903). I have “Show message notifications” enabled in my phone’s Android Auto settings. Here’s an example of a script which will send a message to my phone and smartwatch, but not Android Auto:

sequence:
  - action: notify.mobile_app_ian_galaxy_s24_ultra
    metadata: {}
    data:
      message: Is there anybody there?
      data:
        car_ui: true
        importance: high

Any ideas?

I’ve just discovered that the notifications are in fact getting through to Android Auto (I can see them on the list when I open HA), but I’m not seeing a message pop-up. Is there any way of getting messages to pop up on Android Auto?

You need to edit the notification channel settings and turn on pop-up on screen

Thanks for that. I’ve changed the script to specify a channel of “car”, and enabled the “show as pop-up” option for the “car” channel in the companion app. The notification does register in Android Auto (i.e. the message counter increments), but I still don’t get a pop-up.