[neogodless]

I'm on the latest release version (20H2). If you go to Settings > Sound, there's a Related Settings heading, under which you'll find Sound Control Panel. There's the list of output devices where you can Set Default, and there's a tab for Communications, though there's not a lot in there. Is that what you're talking about?

[franga2000]

Yes, that's the one. I've have that menu as well, but it's not always there. I think there were a couple of versions without it, but they probably realised this exact problem and put it back. Still not a very discoverable thing for someone who doesn't know exactly what they're looking for though.