I plan to move to Protonmail, but debate about creating custom domain or not. Even regular protommail domain is sometimes banned (read in the news about several cases of this, for now only in the authoritarian hellholes) which is bad for sych critical service as email.
There's a strange 'feature' of Discord where if you share your whole screen, audio is not transmitted. If you share the specific application, audio will be transmitted. I'm not sure why it works like this.
It's documented on their website under the 'How do I screen share with Go Live?' section:
Discord captures audio at the application level by inserting a DLL with a hook on the relevant system calls. This works remarkably well, all things considered, but it does have a couple side effects, notably the fact that if you're not streaming at the application level, audio doesn't work (they could probably work around this if they wanted to, but it's basically a natural consequence), and the fact that some applications will become unstable or crash when being streamed. It also requires every anticheat ever to whitelist Discord's DLL.