Yeah, and that's utter nonsense. Noone is really stepping up to develop Android beyond repackaging it.
If Google decides to remove a feature, GrapheneOS and other forks will end up without it too. If they stop publishing security patches, the forks end up insecure too.
It's just like all the Chrome "forks" when ManifestV2 died. None of them survived for more than a few versions until maintainers lost interest.
Calling any of these Google free is downright lying.