CoMaps behaves very very weirdly on GrapheneOS. Same with OrganicMaps.
Osmand and GMaps are working fine.
Waze is almost melting the poor thing. Beside of that working fine.
Osmand and OrganicMaps work flawlessly for me. Waze on 6 (not pro), works better than on my 9 Pro.
I use Comaps daily on GrapheneOS on a Pixel 8 Pro and it works great.
Weirdly how? CoMaps seemingly works fine out of the box on my device