I don’t play my monk very often, but don’t weapons like Fans and Fists stay hidden while you’re in combat fighting? It doesn’t show up on your back or on the side, the only time you’ll ever see it drawn out is when you unsheathe your weapons and standing idle.
no fist weapons show up
You’ll see it sometimes in combat. A lot of moves like Rising Sun Kick will hide it and a new animation will have to unsheathe them again.