With direction Google has chosen to go with the Pixel 10, it might as well be that GrapheneOS will never be available on the Pixel 11. They started by not publishing device trees anymore, squashing commits in AOSP, publishing open source drivers as a tar ball dump only after the requester has entered personal data in a web form, instead of having them public in an version control system. I wonder what dumb ideas they come up with next in order to make the GrapheneOS people suffer even more.
Which was not the point. Each one of these changes made it harder, not yet impossible to make a custom Android or Linux variant. The harder it is the more likely people will continue. At some point it might be too hard. Or, one of these changes will finally make all of that impossible.