If it was a non-issue they wouldn’t introduce this to begin with. There’s not a single good reason to why an OS would ever need to know someone’s age.

One of the proposed ideas in a Discord-based thread was to use OS-level age authentication to prevent you from having to provide IDs to a thousand other parties. One place, one time. So that’s one reason for an OS to need it, in a world hellbent on increasing age restrictions. I don’t know enough about that idea to argue it, though I’m certain it could be spoofed in 0.2 seconds after release. It sounded like the EU solution is a dedicated, non-identifying birth date tag in their passports. But what do I know. I assume all age restrictions can be circumvented, so I see no point in all this theater. And it’s theater because it never really seems to truly be about protecting children. At least, to me, I’d be more concerned about SFW manosphere bullshit than NSFW porn when it comes to protecting kids (yes, I’m well aware a great deal of porn is misogynistic, degrading, abusive, etc)