MarsSeed [1] filed a deletion request for nx-plasma-look-and-feel- compat-git [2]:
Unused. Does not work on current KDE Plasma 6.
To this day, upstream is only maintained for KDE Plasma 5.
If they ever port it to Plasma 6, a properly named package should be
submitted to AUR ("plasma6-themes-*").
[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/nx-plasma-look-and-feel-compat-git/
