The telegram app has a very nice interface, but I want to use a self hosted xmpp chat server.
Is there maybe a fork of telegram that makes it work with a self hosted xmpp server? I would imagine that this is possible.
If not, is there anything that at least gets close to how nice telegram UI is?
Your comment implies that OP wants a fork of telegram server. Which he clearly doesn’t since he wants to use XMPP for the server and a fork of the client.
This is a very reasonable question.