I am not a core committer for twofactorauth.org (yet! I hope to become one!), so I cannot say whether they will accept a PR like that. However, there is an open issue discussing this topic that is worth reading over [1].
2FA Notifier has a bit of an easier job since we don't have to render anything or make it searchable (as of today). I would happily review any PRs along these lines! The data is currently hard coded in a Typescript file, which makes it really easy to update [2].
I plan to document criteria for contributing data to 2FA Notifier like this, but just haven't had the time. One entry per PR would be ideal if you are motivated to contribute!
