And since Project Treble you wouldn't even get the drivers, because Android Linux is a pseudo-microkernel now, where drivers run in userspace and talk via Android IPC (Binder) with the kernel, enforced since Android 8.

They are trying to avoid it, but I doubt the EU will let this stand:

https://www.developer-tech.com/news/google-alters-play-store...

Android is open source partly because they can fund it from Play Store profits. Google is thinking that their Play Store profits are going to be cut, and they want to make the profit up elsewhere - and importantly, maintain control of the platform. This is their method.

They've already used this playbook in the past with Google Play Services, and even before that when they abandoned all the built-in open source apps (Email, Calendar, etc.).