How do I set up a VR controller with a widget interactor that is only active in menus?

I want to know how to modify the VR controller so that it has a widget interactor that only shows up when the widgets appear. It also need to appear on only one hand and should switch to the other hand when you press the appropriate trigger button. I am making a game and only need the Widget interactor on the main menu level and the pause menu in game levels. A good example of what I am looking for is in beat saber. The main game will have two hands and involve throwing items into goals.