Is osmAnd under osm? if changes are made on osm are they also seen on osmand?
Is there any navigation maps that could be used on the phone that doesn’t share personal information (phone/location, deviceID, etc.) with third parties? I’ve tried to use OSMAnd but they’re it’s terrible for subway/bus navigation (as well as organic maps --although to my knowledge they’ve been privatised).
if changes are made on osm are they also seen on osmand?
They should be, but probably not right away.
Is there any navigation maps that could be used on the phone that doesn’t share personal information (phone/location, deviceID, etc.) with third parties?
You can try OrganicMaps
Edit:
Didn’t notice you already mentioned them. Don’t know what you mean by “privatised”, they never were a government company and I don’t see how it’s bad.
OsmAnd is quite good with privacy though (εxodus) and has a rich feature set.
I have never tried routing on public transport as OSM data is limited in some places when it comes to that. It’s fine for basic information (e.g. where the lines and stops are), but rarely any map app has realtime and / or timetable data included (see above).
There is the app “Öffi” (https://oeffi.schildbach.de/), which is doing PT routing and is quite nice, using the publicly available data from transport companies.