https://grapheneos.org/features lists features of GrapheneOS which differentiate it from AOSP. Are you claiming this is all fake?
Most of the security measures are something you can take with lots of Android devices, and is nothing exclusive to Pixel/Graphene fairy tales.
Is the Pixel 8 not the first device to support MTE? Is hardened_malloc pointless? And I literally listed 3 more features exclusive to GrapheneOS in my last comment.