Yep, as long as you update your kernel, you’re good to use Ryzen with Ubuntu. [2] AMD Ryzen with Ubuntu – Here is what you have to do to fix constant crashes!

Does Ubuntu support AMD Ryzen?

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

Does Ubuntu work with AMD?

All versions of Ubuntu are compatible with both AMD and Intel Processors. Download the 16.04. 1 LTS (Long Term Support) and you’re ready to go. Just make sure you choose the right processor architecture i.e 32/64bit version.