Does Ubuntu support Ryzen?

Ubuntu 20.04 LTS A Nice Upgrade For AMD Ryzen Owners From 18.04 LTS – Phoronix.

Does Ubuntu work with AMD?

The gist of the matter is: You can install AMD64 software on both AMD and Intel processors, as long as they support that type of architecture (Don’t worry, almost all processors released in the last 5 years do). So just go ahead and install Ubuntu using the 64 bit iso.