You can with dino. I wish I had the time to work on getting A/V calls back in gajim. It could be worth asking an NLNet grant for that…

https://dino.im/

Yes it works but it lacks QOL features like automatic compression of videos or images when sending attachments. A bit too barebones.

Why would you want to automatically degrade the quality?

It does not have to be automatic. Easy to expose that through options, most clients do that. Also, I don't need pictures shared to be at the utmost best quality.

How would you send an uncompressed video/image? Like thumbnails?

In addition to Dino, you could use movim as a PWA.

And they are both compatible, unlike Element and ElementX ;)

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.

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).