I got it to work through the Lemmy web interface before but can’t make it work now. Equally, I can’t get their profile up to follow on Mastodon.

I don’t know the cause of that but it might be an issue with that instance or federation in general.

edit and now it works just fine. Keep plugging away.

Worth noting that, as I posted the link above, the profile now appears below my post.

Seems to work from my instance.