RHEL is downstream from CentOS Stream which is downstream from Fedora. People are complaining that the changes RHEL makes from CentOS Stream (and thus Fedora) are not public. There is no direct effect on Fedora.
That said some will still not be using Fedora bc they disagree with the ethics of Red-Hat's decision (although I'm surprised they didn't have an issue with Red-Hat before)
I use Nix btw