“Gamepad Special Right” is now corrected to “Gamepad Special Left” in 4.22 for anyone that might be confused why their menu button not working.
But “Gamepad Special Left” is a different button on Xbox controller which would have separate functionality! I know people complained that Gamepad Special Right was on the left Touch controller, but from a UX perspective it made sense.
Oculus have a reference on their developer site, but it doesn’t include the “Special” buttons - https://developer.oculus.com/documentation/unreal/latest/concepts/unreal-controller-input-mapping-reference/