Set up a new system with archinstall, and it defaulted to running Wayland, which is nice. However, screensharing in Jitsi and Zoom did not work. After a little research I found:
The solution was:
pacman -S xdg-desktop-portal-kde xdg-desktop-portal
Then screensharing in both Jitsi (WebRTC) and Zoom now work.
Here is a nice testing site for WebRTC: