Update – My previous answer is no longer true. Google has added AMD and Hyper-V support into their latest beta. Thanks to ReverseCold for letting me know. Please see his answer below.
Update 2 – I had to set this up today. To save some googling, here is the powershell command to enable Hyper-V. Pulled from Microsoft’s Docs
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
Make sure to run powershell as an administrator.
Update 3 – Turns out there’s a difference between Windows Hypervisor Platform and Hyper-V. You’ll need to enable the first one for Android emulation to work. Just click start and type Turn Windows features on or off until you see the control panel option of the same name. Then enable the feature from the menu that pops up after clicking that.
According to This answer, AMD virtualization for Android is only supported on Linux. If Ryzen becomes hugely popular, maybe they’ll write one for Windows, but I won’t be holding my breath.