I can assure you there's a whole lot of telemetry and tracking in those. It's not "and nothing else."

Apple is the least awful about data privacy. Owning your hardware and stack is still better for privacy.

*edit: others have bored this is still using Google hardware with only a custom launcher, not a unique firmware or os environment for data sovereignty. That Sudha, and the lettuce still remains that we need more open hardware vendors, or legislation that let's us unlock our own purchased devices to modify further. *