BIOS

Enable AMD-V Virtualisation for Ryzen CPUs

MSI BIOS

SVM

The first thing to note is that in the BIOS the setting to enable the CPUs virtualisation features is listed as SVM rather than AMD-V.

Setting Location

You can find the virtualisation setting (for some reason) withing the overclocking section of the BIOS:

1
OC > CPU Features > Advanced > SVM