Enable developer mode on Android Auto Developer options are experimental features not released in the official app. Because they are still in testing, you may encounter bugs and unintended behaviors.

Update: Android Auto’s phone reboot issue when connecting wirelessly can be fixed by turning off freeform mode and desktop mode in Developer Settings. With Android Auto versions 13.4 and 13.5 ...

However, Android Auto is evolving at a fast pace, and an announcement released last year at Google's I/O developer event indicated that a full-screen mode would eventually be required.

Android Auto 14.6 started rolling out via the beta program early last week, and Android Auto 14.7 made its debut just a few days later, having now broadly rolled out to beta testers.