Is CachyOS in violation of upstream licences?

Not exactly the post I wanted to make, but here we go.
I have been daily driving CachyOS for a while now, as I wanted to experiment a bit more with distributions I never got to use. I am actually having a good time, so there is no hate nor ill intent of mine over this project.

Still, today I was reading some documentation I ended up on with some narrow exceptions for caching.

My understanding is that those clauses are in gross violation of several upstream licences like the GPL3.0, as one cannot prevent third-parties to freely distribute derivatives (which packages are).

Am I getting this wrong or the language of that policy is unenforceable and possibly illegal?