There are so many species of ghost shrimp. A small few 2-4 will breed in FW. Good luck telling them apart, attempting to breed them.
They're difficult because they're mostly wild caught.
Straight out of Walmart, no big broods but babies would show up. Whoever supplies my Walmart knows exactly, but their feeder status keeps them frowned upon. They keep the order sheet out in the open, I could look for reference.