Osmand does have a plugin for open reviews or something and I think I saw there were plans to use another source too. I guess, on top of photos from Wikimedia and mapillary it is trying to become a bit like Google Maps in a way...
There is also a plugin for mapillary street view that doesn't work too bad.
Only missing a Web app for desktop.
Public transit navigation is possible in Osmand but there will not times just the routes and only if the data is present in Openstreetmap and that pretty rare, really depends where you live.