@lhengst When I installed my nuc, one of the frames had 2 queen cups on it.
I don’t advise reopening the hive and pulling frames just to show us pictures. You could roll and kill your new queen.
Found this online:
Actually it is quite normal to see queen cells, supercedure cells, etc. in a nuc. When a split is made to start a nuc colony, it contains unsealed brood. Often, a nuc is not provided to a new queen for a day or so, (whenever the beekeeper gets to it, or receives queens.) Partly because of the reduced size of a nuc box, bees in a nuc determine very quickly that they are queenless, and immediately take action to make a new queen while the eggs are still viable. Even when the queen is introduced and in her cage, she is of no benefit to the new split because she cannot lay eggs in a cage, and the clock is ticking.