the ldap auth works great for the apps. apps dont play well with an oidc login process. i ended up using both, oidc for web and ldap fall back for applications. made it easier for my non tech inclined users. most of the current apps also support quick connect, like the plex link process. you auth on a web browser and enter a code into the app. so it’s possible to use only oidc for log in and, i believe it should be possible use css to even hide the user name and password fields.
symfonium has been mentioned in this post before specifically for android auto. i had the same hang up with apple car play. i didn’t use most of the plexamp fancy features. i just wanted it to play music and be easy to use when driving. manet finally came along for ios. though i’m still hoping one of the open source apps adds the functionality later.