Are you planning to, or would you consider, adding VR controller button integration to KRPano? For instance, when in a headset, I would love access to the joystick and have a right move take you to the next scene, left to previous and click to call up thumbnails.
I suspect you are already using the WebXR API. For instance, you detect whether the tour is in a real VR headset regardless of what the browser says. (I'm looking at you, Oculus Browser.) Now when tours start they automatically go into immersive VR instead of playing in a browser window. And obviously you detect the primary trigger click. So.... maybe adding controller button integration wouldn't be that difficult?