GrapheneOS has minimal, private [1] system apps so you don't have to debloat anything yourself. Manual debloating is not a good solution at the user level. Some system apps are being overhauled, so that's something to look forward to. Gallery will be [2] based on ReFra [3]. [1] Except phone and messaging but that's the cell network. GrapheneOS recommends Signal/Molly or SimpleX instead. [2] https://nitter.net/Graphen…
And Graphene OS is also anti-user by being tremendously rude about NOT providing root and using the same tired "suck-u-rity" crap Google and Apple also use. If you're smart enough to buy a phone that supports GrapheneOS, AND install it, yeah you should have root. And tools like XPrivacy and plugins allow control of subsystems like GPS spoofing and lying to apps.
I think the decision of GrapheneOS to maintain the attestation features and not providing user root is what gives it a fighting chance of being accepted as legitimate 3rd choice. See: Revolut and others adding GrapheneOS keys and trusting their attestation
Like or not, for most users, having root access is a liability, especially with more and more important things being held on phones . Someone downloading a photo editing app and then having a rootkit installed in the background that waits to empty their bank account is not a workable situation.