Openrgb is what you want. It’s tricky to figure out though. It’s not just going to recognize the device and poof magic. You’ll have to fiddle with HOW it’s connected - through your rgb header, bios settings, separate controller etc. Once it’s recognized, you may have to play with the settings for how many lights it has etc.
When I first used it, it thought it didn’t do anything. Then I learned and got it to do everything.
Another vote for fedora here.
I use regular workstation. I like gnome so that fits. And I found when I set up arch exactly the way I liked, I was just recreating the fedora experience ;)
It’s not bleeding edge but I don’t think anyone really needs that unless you just bought a brand new vid card or mobo etc. If your components are common and 6mo+ old fedora is new enough.
I really don’t have issues with it. It seems to have become the new Ubuntu (install it and it just works).