An example project for VR Widget Interaction in Unreal Engine 4 from the CouchLearn.com guide: https://couchlearn.com/how-to-make-vr-interactable-ui-widgets-in-unreal-engine-4/
This example project is configured for UE4 4.23. Using a newer engine version this project example should work but may require tweaking.
This project requires a VR Headset with Motion Controllers.
VR Motion Controller triggers for widget interaction
VR Headset movement to move the camera.