I also switched to the Transit app for public transit after google maps stopped showing the option to start navigation and only allows for searching for routes now. Not sure why it stopped working. Maybe because I use GrapheneOS, but it worked on Graphene before with no issue, so could be a combination of policy changes and using a non Google OS or something. It works fine with driving and walking still.
For driving, I still can't find a comparable app that has both real-time traffic which is essential in my city to avoid constantly fluctuating bottlenecks due to construction, traffic pattern changes, and rush hour traffic. I found one at one point, but it didn't read the names of streets, just said "turn right" instead of "turn right on first avenue". This is confusing when streets are close together or it's treating alleyways as streets, etc. CoMaps is the best I've found if it had traffic routing.