Hi Ahmed,

You can access them via Unity's input system - Here some sample code for the left hand pinch:

    [SerializeField] private InputActionProperty _leftHandPinch;

    private void OnEnable()
    {
        _leftHandPinch.EnableDirectAction();
    }

    private void OnDisable()
    {
        _leftHandPinch.DisableDirectAction();
    }

    private void Start()
    {
        _leftHandPinch.action.performed += LeftHandPinchPerformed;
    }

    private void LeftHandPinchPerformed(InputAction.CallbackContext obj)
    {
        Debug.Log("Left hand PINCHED");
    }

The corresponding input actions to assign in the editor are 

• triggerPressed [LeftHand Qualcomm Hand]
• triggerPressed [RightHand Qualcomm Hand]

and for grabbing

• grip [LeftHand Qualcomm Hand]
• grip [RightHand Qualcomm Hand]