I’ve run into this problem a couple times and I thought it would be a nice feature to add in future releases.
A Player Hand / Private Window is usually restricted to one player. But there may be times when a player may be able to view another player’s hand. It would be nice if there was some sort of switch a player could activate that would unrestrict the window allowing another player to view their hand and then, once viewed, they can switch the restriction back on.