@ponapalt I am unable to bind the ukadon account to gravatar!
Can you please add the rel="me" attribute to account__header__fields when you have time?
@steve02081504 My Gravatar became an authenticated link with no problem, so I guess it's a timing issue.
When you add/update a link in the Additional Info section of your profile, it takes a bit of time for the Mastodon side to reflect it.
If you give it some time and then retry, I think it should work fine.