Originally Posted by rapdes
This is on the car screen, in my chevy truck, there actually is no phone interface anymore, since Android auto is built directly into Android Q, I have no app icon for Android auto anymore.
Uhm... Sounds very weird to me... But there's something you can try. On Magisk Manager, go to Modules and erase Substratum with the trash bin icon (be careful that this will wipe any overlay installed, if you care about re-setting every overlay, make a backup). Reboot. Open Substratum, it should build the module again. Reboot and then follow the standard procedure to apply the overlay, so build it, reboot, and enable it.
It happens sometimes that the Magisk Module gets buggy. It could be the case. If it's not, I should investigate even deeper, but that's worth a try.