MarsSeed [1] filed a deletion request for cutefish-kwin-plugins-git [2]: Broken. Discontinued 2 years ago. [a] Does not support KDE Plasma 6.
[a]: https://github.com/cutefishos/kwin-plugins [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/cutefish-kwin-plugins-git/