It does for a long time.

However, applications that just grabbed X11 framebuffer won't work. They have to use respective APIs with user control ("portals") for that. Some do (Chrome, Firefox), some don't (MS Teams).

I use it every day. I can share screen in Google Meet, Zoom, Slack Huddle, and many others. It doesn't work in Signal, though, because Signal is using an outdated version of Electron.

Since each company sort of sticks with 1 tool for every employee, could be kind of a deal breaker if they pick a tool that can't screen share on Wayland.

The best app for this task doesn't support it: https://github.com/rustdesk/rustdesk/issues/56

Yes, and has basically since early covid...

So does RDP and VNC, if you're interested... Across most every variant (wlroots based - ex: sway, gnome - mutter, kde - plasma wayland)

No! The Wayland protocol provides no mechanisms for screen sharing and it is not intended that it ever will. Screen sharing has to be done by external protocols that are either compositor specific or using a somewhat standardized dbus protocol that is completely separate from Wayland.

It seems to work for a lot of people, but I still get constant crashes using xdg-desktop-portal-wlr, despite trying multiple GPUs, extensive testing etc. I will probably dive into the code when I get some time.