User profiles on self-hosted jitsi

I have clients asking about turning their display names into hyperlinks to their profiles on a different system.

a) Is it possible to turn the display name into a link? If so, how? If there’s any documentation on doing this, that would be spectacular; I couldn’t find any.
b) Is there a way to create simple profiles (ephemeral are fine) in a self-hosted jitsi? I keep finding things about vcards, but I have absolutely no idea how to implement them, beyond activating the prosody modules.
c) As an aside, is there a way to interact with prosody while connected to jitsi? I would assume there’d be some kind of commands I could put into the chat, but I can’t find the answer.

Thank you so much for any assistance!

– Riley