Create an item summary search.
Columns
Item summary type group
Inventory location summary type group
Formula(numeric) summary type maximum formula = MAX({location on hand}) - SUM({bin on hand.qtyonhand})
Then add the same formula to criteria with is not equal to zero
This will compare the sum of qty in all bins to the overall location qty. if they don’t match it will show up
This should match the bin Putaway