Yes I already use the Fedora KDE Spin right now, it’s awesome!
I didn’t know that it uses X11 because Fedora uses Wayland already for a few major releases.
I think I found a solution for your problem recently. Are you familiar with distrobox? AFAIK you can use it on top of your OS, in this case Tumbleweed, and install another OS in a container, like Arch, and then export the programs installed from AUR or whatever to your host OS.
But nonetheless thank you, I think I should just try it out in a virtual machine or something.