SInce no response...
So we use Unity without headsets to display on screens in Windows 10 Pro.
Make sure to install all the Leap and engine software like hands rigs etc.
If you can shift the hand types in the Leap Controller Software, you can do it in your engine, like Unity.
Most VR have a screen-based display mode... but you may suffer some lag...
It is ok to use older versions for specific tasks but optimization and bug fixes have been essential to dealing with occlusion and other problems