Kieshi It worked. Thanks! I was able again to bind settings for secondary control and secondary hand.
However there's another issue. In player mode the hand gestures only work if the player interface is open, i.e., when the black rectangle with play/pause/next/previous buttons is shown on screen, the hand gestures work, but if I hide the player interface the hand gestures stop working.
This kind of defeat the purpose of the hand gestures. If the buttons are in front of me it's easier to click them than to use the hand gestures.
This issue only occurs with hand gestures. Quest controller bindings work fine when the player interface is hidden.