I mean I'm usually not the skeptic when it comes to privacy rights, but it's hard for me to defend against an action like this. Because I don't see a purpose of needing that information outside of the intent to sell to third party
I couldn't imagine an AI model will be very accurate of being able to identify a 11 year old vs a 13 year old. I assume this is more to try and vett whether they can access NSFW channels or not, but honestly since humans can't properly vett that, I don't know how an AI is supposed to reliably do that.