I’m not sure about unreal engine compatibility, but I’ve been using Fedora Silverblue and it works good enough. Sometimes I’ve seen graphical bugs, but they are fixed quick enough for me to not care too much. Since I use the computer for work (and I don’t have much time to fiddle with my system) I have found that an atomic distro is the one that requires less maintenance, so it allows me to just do my work without having to troubleshoot things breaking. I have switched a lot of linux distros because I was never satisfied with how things looked or worked (and because of bugs with nvidia and other things, I am a long time linux user and things have never worked as smooth as today, now that we have wayland and proton and a lot of nice things). At the end of the day, I believe that the best thing to do is tho choose one of the most popular distros (Ubuntu, Fedora, Debian, Arch) and make adjustments to fit your needs. Distro hopping is fun, but not so much when you’re short on time and you have stuff to do. Hope this helps.