GrapheneOS does not even register on Google scale! It does not even manufacture its own devices!
Bigger problem is HarmonyOS and similar devices, compatible with Android. Opensource threat from china!
And no NSA backdoors or honeypots!
GrapheneOS does, however, register on the FBI's radar because a lot of criminals know to use it, and the FBI can't crack it.
Sure, let's just trade the NSA for the CCP, no issues there.
If the hardware security is on par with iPhone / pixel 8+, then sure.
Otherwise there's no need for NSA backdoors (as Cellebrite matrix shows) :)