[neilalexander]

There is not a single good XMPP client for macOS or iOS either. There are a couple of minimally functional ones that are aesthetically dreadful, but nothing that would come even close to replicating what people would expect even from Signal or WhatsApp, let alone a monster like Discord. Certainly nothing that I could ask friends or family to use.

[nicoco]

I have had success getting apple-loving friends to use https://monal-im.org/

https://snikket.org/ are working on a new iOS client too (no release so far).