Give MiroTalk a try. Can be self-hosted and just like Jitsi, no need to install anything, it’s all in-browser. Has all the features you’re asking for.

https://github.com/miroslavpejic85/mirotalk

If you want to test drive it:

https://p2p.mirotalk.com/

You probably need to make a request to Izzy. From what I remember he has requirements, such as max app size, which makes me wonder if maybe the ProtonMail app just became too big for him to build and host.

Here are the requirements: https://gitlab.com/IzzyOnDroid/repo/-/wikis/Inclusion Policy

It’s probably because Proton changed the repo. I was grabbing their release via Obtainium and noticed the version I had was way older than the version on the Play Store. Had to update my Obtainium entry for ProtonMail to the new repo: https://github.com/ProtonMail/android-mail