Hey minafinity.2025,
Thank you for your message.
The HandGrabInteractors in your Rig use something called HandGrabAPI in order to process the input. You can replace the "hand pinch" with any other signal, like a Trigger. Add a ControllerPinchInjector.cs next to the HandGrabAPI and it will replace the Hand with Controller trigger input. If you want to re-create this to support discrete buttons instead of triggers you might want to create your own IFingerAPI based on the Trigger one.
I believe the HandGrabExamples.unity sample scene is functioning this way too, and for the OVRComprehensiveRig.prefab this is supported by default.
