If the packages follow https://wiki.archlinux.org/title/AUR_submission_guidelines I would go for it. :-)

If it's useful for you it could be for others. 

On October 14, 2022, Frederic Bezies <fredbezies@gmail.com> wrote:

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): 

Thanks a lot for your kind answer.

Frederic Bezies