Did you was able to solve your problem? there is 2020 AMD drivers.
Chipset:
https://www.amd.com/en/support/chipsets/amd-socket-am4/b450
Graphics:
https://www.amd.com/en/support/apu/amd-ryzen-processors/amd-ryzen-5-desktop-processors-radeon-vega-graphics/amd-ryzen-5-0
or contact: tech.support@amd.com