Google is not targeting graphene, google is targeting custom roms in general. Graphene isn’t the only project impacted by them.

It’s a fork and always will, it’s still android. I don’t get why people refer to it as a different project. It’s the same project with tweaks.

Most of the time I find this stuff on 4pda. Sure it’s in Russian and it requires an account to download files, but they delve much deeper into the device and usually you’ll find working instructions how to unbrick stuff.