I see nothing that is definitely a queen cell. Two possible queen cells are covered with bees, so I can't see for sure. The others are queen cups, not cells. If the two are cells, they are supercedure or emergency. They are not swarm cells.
If they are full, I would add a box. If the box was the same size as already there, I would take a couple frames from it and put in the new, replacing them with empties from the new. That will decongest the brood chamber and give them a start in the new box.
If they are full, I would add a box. If the box was the same size as already there, I would take a couple frames from it and put in the new, replacing them with empties from the new. That will decongest the brood chamber and give them a start in the new box.