I have a google workspace account and android auto works for me. I did notice that I didn't seem to have calendar access and contacts didn't seem to work (call Joe Jones didn't seem to work) but I did some searches and found I needed to enable search and assistant and that seems to have fixed calendar access or at least I can now enable / set it in the AA settings on my phone. Curious to see if calling / contacts works now.
This thread is about Android Automotive Operating System (AAOS) which is an operating system and platform running directly on the in-vehicle hardware and does not require a phone. Are you sure you're talking about the same thing? _automotive
B) create a personal Google Gmail account and login with that. That will allow you to download and update apps in the car (there aren't many yet). Create a home and work in that personal account in g maps, then you can quickly "navigate home".
C) If you need to access contacts via Google maps by typing in names rather than just addresses (not needed for phone calls) you can share (download/upload) your contacts between the 2 accounts. May be an issue if your address book is huge or changes frequently.