I'm typing this using Linux on a MSI B550 MB I built a few months back. The network and sound drivers did not work out of the box on any version of Linux I tried. Ubuntu install process would not even complete. Pop! did come up, but no sound or network. I borrowed an old USB network adapter and was able to get most everything working once I had access to the internet.
The sound still breaks after every kernel update though as the drivers continue to evolve. I've been running Linux on my desktop for twenty years now, and I couldn't suggest anyone who hasn't to try a Linux on a next-gen motherboard as it is pretty much always a disaster for a year or two.