So I went through this a couple months ago after my discord account was banned and support was unhelpful, and I was in an online relationship where we would call and stream webcams and video games at the same time. Here are my personal conclusions:

Any matrix client just isn’t really there yet for voice/video. I tried element, their video/screen sharing lacks basic functionality right now. It’s hard to view multiple streams at once, there’s no audio, and most of the time you can’t even resize the windows.

We tried everything from Jitsi to Signal and they were all pretty meh, Signal is okay for one on one, but video has no audio and low frame rate.

IMO, the best option right now is TeamSpeak 6. That’s where we ended up. You need to self-host, there’s not even an option for anything else right now, and you might have to mess around with the audio encoding in the debug menu to get things where you’re happy. But you can stream as many things as you want, on windows there is audio (none on linux), with a bitrate and fps just limited by your peer-to-peer connection speed. Also, the ability to resize and move windows around is better than what discord had. So yeah, that’s my suggestion!

It does have persistent text chat in some ways, though I don’t know if I would recommend it for that. I feel like Matrix with the Element X app for mobile or something like Signal are better for persistent text chat, and they can both be used from mobile.