I use CoMaps, it works like a charm on GrapheneOS + Android Auto.
I have also contributed to the OpenStreetMap by adding POI and requesting logic to be changed.
The only major issue which I got used to but sucks, is the search when it does not involved famous places or streets or both.
Streets will be shown as minor or major and alike, I do need to use Google Maps Browser version to find the place, and the on CoMaps manually navigate to said place.
But the fact that I get a map update a week, sometimes two maps update a week which other apps will take months and subscription, that alone is worth hustle.
I have also contributed to the OpenStreetMap by adding POI and requesting logic to be changed.
The only major issue which I got used to but sucks, is the search when it does not involved famous places or streets or both.
Streets will be shown as minor or major and alike, I do need to use Google Maps Browser version to find the place, and the on CoMaps manually navigate to said place.
But the fact that I get a map update a week, sometimes two maps update a week which other apps will take months and subscription, that alone is worth hustle.