Hi,
KDE 6 is alive, congratulations to the dev !
So, I did a test with krfb on wayland, I have to confirm the share screen on the devices running krfb on Wayland.
I hope soon a solution 
KDE Plasma Version: 6.0.1
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.6.21-1- (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Celeron® J4105 CPU @ 1.50GHz
Memory: 7,6 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 600
[nls@ody ~]$ krfb --version
krfb 24.02.0
[nls@ody ~]$
Edit : I found a bug on KDE 6, my taskbar is on the top screen, can’t access to the settings by doing enter edit mode, the settings windows are superimpose, see below the screenshot
