I understand what you mean, as in GrapheneOS is a bit dependent on Google right now allowing third-party OS support. But, you have used words which actually mean something different in the software world. Keys often refers to signing keys for software and it’s important to note that Google doesn’t control those keys for GrapheneOS at all. GrapheneOS owns the keys, and signs all of their builds locally.
I understand what you mean, as in GrapheneOS is a bit dependent on Google right now allowing third-party OS support. But, you have used words which actually mean something different in the software world. Keys often refers to signing keys for software and it’s important to note that Google doesn’t control those keys for GrapheneOS at all. GrapheneOS owns the keys, and signs all of their builds locally.