Quest 2 performance - SteamVR vs OculusVR OpenXR... Why does SteamVR perform better?

Hi - when you moved from the Link method to the VD method did you have to edit the registry back to the default value it was?
I’ve had Link working ok and now I’m trying VD. But when I ctrl+tab it doesn’t go 3D in the hesdset. MSFS splits into left/right eye views but the quest 2 doesn’t combine into 3D.
Thanks