What is going on is frustration. GrapheneOS has been relying on Google's good faith effort on providing binary blobs to Pixel in addition to AOSP to make their OS. Google was under no obligation to give that, and they stopped doing it for whatever reason.
To make things worse, GrapheneOS mentions legal/anti-trust blah blah blah, which means no engineer will touch / comment / help in the matter, and it gets routed to legal blackhole.
> This also marks the availability of the source code at the Android Open Source Project (AOSP). You can examine the source code for a deeper understanding of how Android works, and our focus on compatibility means that you can leverage your app development skills in Android Studio with Jetpack Compose to create applications that thrive across the entire ecosystem.
https://android-developers.googleblog.com/2025/06/android-16...
This was posted 2 days back.
AOSP feels incomplete without there being some flagship way to use it.