Thanks for the advice, but this is Android Automotive, not Android Auto.
The entire car runs Android stand-alone.
The app selection is quite small still.

Almost everything, finally!
OS: GrapheneOS
Calendar: Proton
Browser: Firefox
Storage: NAS
Youtube: NewPipe and SmartTube

I’m still stuck with Maps and Android in my car as it has Android Automotive, but I’m happy with my progress so far