I don’t think there was a good answer given, but you didn’t exactly say where you wanted to display them.
The serial numbers are stored in several places, depending on where you are in the order process. Unreceived/unshipped are in Reservation Entry. Received/Shipped are in Tracking Specification, but only up until the point that they are invoiced. Received/Shipped/Invoiced are in Item Ledger Entry.