A-Frame implementation of the "Walkabout" XR locomotion.
Basically, you go back and forth from one end of your designated area to another and rotate the scene when you reach the guardian boundary.
Tested on the Oculus Quest 2. Rotate by bare hand pinching or pressing the "grip" button on a controller.
Stackoverflow question and GitHub link
Playcanvas implementation of the same "Walkabout" XR locomotion.
My question on the forum and GitHub link