Devices are sold with GrapheneOS preinstalled, just not by GrapheneOS. If your paranoia needs aren't high but you just want to get away from Google, it seems like a good idea.
You can also factory reset, check boot key hash, and use Auditor to verify integrity on devices sold with GrapheneOS preinstalled. That's what they currently recommend to do for Pixels sold with GrapheneOS preinstalled.
You can also factory reset, check boot key hash, and use Auditor to verify integrity on devices sold with GrapheneOS preinstalled. That's what they currently recommend to do for Pixels sold with GrapheneOS preinstalled.