I don't trust this one bit.
The reason is simple: the pattern I see hints that there is:
a) money spent, to push through age-sniffing, and b) it is happening almost globally.
I am not necessarily saying that all this can be singularized down to one bribe-using company, be it Meta, Google or what not, or state actors becoming beyond Evil. But just as the butterfly effect is used as analogy how a strong wind can be created further downstream, I see the situation here VERY similar. To me it is not confined to age-sniffing. Remember the sudden declaration of war by the UK against VPN. This is in my opinion connected here. The goal is not "protect the children" but instead spy more on people than before. A gradual extension of this. And some companies and private interests will benefit. See also the recent Palantir claim made against London aka "the major is responsible for more robberies when he refused to obey to our rule". These companies are greedy - and insolent.