Ok. So maybe do something like this:
Make 3 editable text boxes. When player enters the number save it as Int. Make some indicator below the boxes and make it that you “move” it left and right.( it doesn’t have to actually move, make 3 of them and change their visibility) It will show which number the player is editing right now.
And change the current Int with up and down. Then send it back to the editable box with some kind of bind.