Earlier quoted context omitted.
Android doesn't ask your age, Google does for an account. You can use an android phone without a google account. Most people don't but the distinction is important because degoogled android phones will also have to comply.
No, unless the law mandates it. So for example operating system that does not ask this question could simply declare itself "inappropriate"/"illegal" in the jurisdiction. Say, GrapheneOS can explicitly disallow image downloads from Californian IPs and not sell phones with preinstalled GOS there. You don't need to be complaint with the Mongolian law to sell in Burkina Faso. Similarly they don't need to be complaint wi…
Edit: I have no control over who links to my library.