I just searched google again for this, and found this SO-thread:
https://stackoverflow.com/questions/74652736/does-android-automotive-support-jetpack-compose
The accepted answer from 2022:
In general, it is not possible to use Jetpack Compose to write an application for Android Automotive OS that will be distributed via the Play Store. There are a few exceptions to this however:
1.
Parked apps can be written in either Views or Compose and do not use the Car App Library templating system
2.
The Settings/Sign In activities of Media applications can also use either Views or Compose.
One thing to note is that only the following category of apps are currently permitted on the Play Store for Android Automotive OS
• Media (audio - e.g. music, podcasts, audiobooks)
• Point of Interest
• Internet of Things
• Navigation
• Parked apps
◦ Video
◦ Games
◦ Browsers
(see
Supported app categories for more details/up-to-date information)