The API behaves this way:

> To request a user's age range and sharing status, you call the Play Age Signals API (beta) from your app at runtime. The default age ranges the API returns are 0-12, 13-15, 16-17, and 18+, but you can receive custom age ranges.

https://developer.android.com/google/play/age-signals/use-ag...

But I don't find it any better. I don't see any viable reason to provide identification to my phone's OS. If a parent buys a phone for their child, they can already set up parental controls before handing it over.

I wish Motorola all the best with their GrapheneOS partnership.