We also have a Danish wallet now, AltID, which implements an anonymized (assuming no collusion between issuer and eavesdropper or service provider) age verification protocol based on batches of single-use tokens which contain no personal information (except that they can be traced back to you by the issuer).

It's been released and in production since summer. Since then, several social networks have apparently started A/B testing age verification for their EU users, but how many of them actually integrate with the anonymous solution that is now available and in production? To my knowledge: 0. They all use Persona.

This highlights one of my main criticisms of EU's naive approach to regulation of tech companies. They fail to realize that any regulation that they impose will be complied with in the most malicious way possible, which is how we got cookie banners with dark patterns instead of a simple HTTP header saying no thanks to cookies.