How to create an interaction by collision or position in HoloLens 2?

I am trying to create a situation that when the user enters a door object, he moves on to the next scene. I don't understand how to create an input that is based only on the user's position (when he walks through the door), without any hand gestures. I was thinking of using a collision between the camera and the object of the door, but it does not work.

Anyone has an idea how to produce an interaction based on position or collision?