EDIT: this is not for MS2020, but for OpenVR games!!!
How to install VR performance Kit:
Forget last part “Build instructions”, that is not install.
You have to download it from GitHub - fholger/vrperfkit: VR Performance Toolkit, you will find link on right side, it says “Latest”.
On next page click vrperfkit_vxxxx.zip
If your antivirus does not allow it (it is safe, do not worry), then click more, then download anyway.
After downloading extract that zip next to your gamefile exe, so you can see 2 files next to game exe: dxgi.dll and vrperfkit.yml
You can change settings in vrperfkit.yml directly (it is text file, use text editor like notepad, or notepad++),
or after starting your game you can set everything with shortcuts. You can see all shourtcuts on bottom of .yml file.
Be sure to check for an update around 3/3/22. They are going to add FFR/VRS. It was scheduled for 2/28 release but since SimUpdate 8 is to release that day they pushed it back (not specific on the date)