@Jojofromjerz Hello and welcome!
I think one can either search or paste URL of their full monicker. Or look at those you are following to see who they're following. At the bottom of their profile it has a link (hope this helps?):

@Antoninthewings @Jojofromjerz is that link specific to only some servers? Because I don't see anything on anyone's.

@fuzzysmith Hi Smith, So here's what I see on your profile (below):

@fuzzysmith (following on from last toot) ... which takes me to this page.