If you care about rgb just look at supported devices and brands here https://openrgb.org/devices.html This is an extremely long list so just find a keyboard you like and see if it is on the list.

Any keyboard is going to work. As Ipacial said not all rgb stuff will work but basically any major brand works with open rgb at this point. I personally have a razor keyboard that I can control the lights with open rgb. I have a Logitech mouse that does not have rgb and I control the dpi with solaar.

I’d recommend installing the flatpak. Tf2 stopped working for me when I upgraded to fedora 38. The flatpak seems to fix whatever dependency issue is causing it. It also fixes portal 2 and Gmod cause those also stopped launching on f38.

Did you update your system other than your nvidia driver? Like from fedora 37 to 38