I think my question was clear enough.
In any case, you base your reply on assumptions; assuming this, could be that etc. Have you seen this been discussed by GrapheneOS developers? Have you contacted them to get their take on this hardware-firmware backdoor?
There’s not much they can do on a google hardware backdoor other than not use google only and support other phones. But we are not officially involved with their decisions, this is just commentary in general
For sure. They could have phones observing their behavior over time. This is what they could do for example. Maybe they have done so. That is the reason of my question to you as an advisor of privacy.
even if you contact them, they wouldn't know due to the closed source nature of the hardware.