Why does it matter? The GrapheneOS team will make the OS images. So as long as the phone is unlockable, has up-to-date firmware bundles, etc. who cares?
GrapheneOS may be de-googled but it is not de-blobbed, they rely on the vendor to maintain certain drivers etc. Hopefully the driver maintenance team is very separate from the bloatware installation team, but someone could reasonably worry that they're tarred with the same brush.
GrapheneOS may be de-googled but it is not de-blobbed, they rely on the vendor to maintain certain drivers etc. Hopefully the driver maintenance team is very separate from the bloatware installation team, but someone could reasonably worry that they're tarred with the same brush.