Those certainly look like wax moth larvae, and the droppings look pretty typical too. If much of the bottom board was covered with what you show in this photo, you might have quite a heavy infestation.
Having said that, wax moths are a fact of beekeeping life. The bees will control them if the hive is strong. Your first inspection will be critical. If the comb is very damaged, and bee colony is weak, I would go back to your nucleus supplier and tell them about it. There are some recipes online for trapping and killing wax moths inside and outside the hive, but I have never tried those. They involve fermenting banana skins and making something a bit like a small hive beetle trap, using that liquid as a bait. I usually let the bees deal with it, and if the hive is strong, just remove very damaged comb and replace with fresh frames and foundation.