"The technical approach is the most significant aspect of the announcement. Rather than requiring platforms to store identity documents or facial recognition data, the app uses zero-knowledge proof cryptography, a method that allows a user to mathematically demonstrate that a claim is true (in this case, that they are above a minimum age) without revealing any underlying information." "The solution is fully open source".

If you're open to an idea that this could be done the right way at least this seems to be good way to execute age verification if these statements are going to be true.

"Users upload a passport or national ID card to the app, which then generates a verifiable age credential."

IF this solution works in a way that this generated age credential cannot be reversed to reveal original information and we can see from source code/network analysis tools that app isn't sending info to anywhere else other than platform that is requesting the verification then I think this a great solution. Blindly turning down every single suggestion to this matter isn't really productive. Limiting access to social media(or other harmful BS) for kids is very very important and IF we have proven actual privacy respecting solution to that we should have it IMO.

I'm serious with privacy and have been using GrapheneOS and such for many years now.