>Mastodon
In the latest version they added an option to set a minimum age requirement for user sign-up:
https://blog.joinmastodon.org/2025/05/legal-features-updates/#setting-age-requirements
This is not age verification, but they don't look opposed to adding it later.
I don't expect this to have a big effect on Fediverse, though. What they are going to do? Block all instances that don't implement age verification?
