Cant find input action Oculus Menu button in Unreal!?

Hi,

one of the VRC test says that you should bind in-game menus to the Oculus Left Touch menu button.
Now most of my menus are actual in-game objects built into the world of the game so don't need this. But there is one thing I could actually use the Touch menu button for.
But the problem is I can't see a binding for this in Unreal Blueprints! Not as a Touch input and not as a Motioncontroller input.

Does anyone know where to find it?

Cheers
Fredrik