2. plasma6-x11 was not installed, although I used plasma5-x11

FWIW, plasma6-session-x11 was installed when I did my update to 20240311.

With plasma 5 these pkgs were installed

	plasma5-session			X11
	plasma5-session-wayland		wayland

Whereas with plasma 6 since wayland is now the default we have
	
	plasma6-session			wayland
	plasma6-session-x11		x11

So they switched the pkg names based on the new default but my plasma 5 PCs and my plasma6 PCs have both installed.

-- 
Regards,

Joe