I've settled on running CoMaps in the Owner profile, with Google Maps/Waze/etc. in the Owner profile's Private Space for when they're necessary.

Can that setup work with android auto? If so, I'll need to try that.

I use CoMaps in the owner profile with Android Auto. Only caveat is that even with Android Auto developer mode enabled, I still had to install CoMaps from Play Store to get it to show up in Android Auto.