the thing is, that human form replicators were collections of nano-scale replicators formed into the shape of a human. Everything they built was also those same nanites.

(The milky way replicators used the blocks to build their ships, where the Asurans in Pegasus were way more advanced and used nanites to build stuff)

(that first human form replicator girl created the spider things because the ancient that built her didn’t let her have a puppy. He was a cat guy.)