you will be coming from a Fedora environment. We have no OCR or OpenBuild to get the odd rpm package you desire.
We do have a bunch of curated 3rd party apps.
Recent reviews to my surprise have praised our well-stocked repo of apps---it wasn't always this way with the reviewers; it took them a while to catch up.
eopkg
is much more to-the-point than dnf.
Solus every bit as solid as Fedora, architecturally, but much prettier.
You will be coming to a true, proud independent Distro, original and not a fork. I've used a lot OSs--as have many--and this is still the most sensible to me, the most uncluttered, and most reliable. And visually the sleekest as well. I know that is subjective. I think OpenMandriva is the most beautiful (on the eyes) distro I've ever seen but no one uses it 🙂.
You have very communicative developers and maintainers and creators here, and on many channels of communication.
I have nothing to say about gaming because I'm not a gamer. I hope you cross over. Good luck.