Are CachyOS PKGBUILDs allowed on AUR?

Hello. CachyOS - https://cachyos.org/ - is another archlinux based distribution with a lot of custom tools and kernels, using KDE as a GUI. I installed in a VM CachyOS and noticed all its customized package in a dedicated repository. My question is: are these custom PKGBUILD are or not allowed on AUR? Here is a link to all CachyOS related PKGBUILDs (30): https://aur.archlinux.org/packages?O=0&K=cachyos Thanks a lot for your kind answer. -- Frederic Bezies fredbezies@gmail.com