I don’t know if you’re replying to the right person or if there is a language barrier. I don’t think Organic Maps is an alternative to Android Auto. Organic Maps is an alternative to Google Maps.
OP is asking for an alternative to Android Auto, and for a maps app that works on that alternative.
There’s OpenStreetMap for maps, and Bluetooth audio for music.
What alternative to Android Auto is compatible with OpenStreetMap? Since OP asked for an alternative, and what maps app works with that alternative.
Organic maps, is what I use.
I don’t know if you’re replying to the right person or if there is a language barrier. I don’t think Organic Maps is an alternative to Android Auto. Organic Maps is an alternative to Google Maps.
OP is asking for an alternative to Android Auto, and for a maps app that works on that alternative.