GrapheneOS publishes a list of the requirements: https://grapheneos.org/faq#future-devices

GrapheneOS devs have announced "We're currently working with a major OEM towards future generations of their devices meeting our requirements and providing official GrapheneOS support. GrapheneOS on both Pixels and these future non-Pixels will be fine." (https://grapheneos.social/@GrapheneOS/115102564799343519)

You're welcome to assert otherwise, of course, but your assertions are contradictory with direct statements from the GrapheneOS team.