I'm on desktop, not QBO, but I assume it's the same as Purchases by Item Detail.  If it is, it doesn't give you a list of the purchase orders and quantities, just item receipts and bills.  Those items could be receipts from purchase orders prior to the intended period and it doesn't show you items purchased but not received.  It seems like the answer is "no, quickbooks can't show you what order quantity has been placed in a given period".  Am I correct?  The best solution would be for the programmers to fix the quick report for items to show the ordered quantity instead of showing a value of "0" for orders that have been fulfilled.  Showing a value of "0" doesn't seem to offer anyone any useful information.