I've mounted too my Garmin on the CRF (2020) used it a few time, last time was both with CarPlay/Osmand to go to VIM Poland ; last travel to Ireland was only Osmand (now I 'm able to manage it ) - I have the Zumo in the top case in case
but never use it now ; how it is comfortable to have the right tool on the right place !
managing offroad trips in differents OSMaps with curves, track difficulties etc ...
I think Osmand is also available for Android, but not sure for Android auto; have a lot of friends who have bought tablet, and mount on the bike to have large screen with GPS
I still prepare my trips on Basecamp and hop via Dropbox in Osmand the perfect way, I think