Add an Existing Backorder Quantity Column to Purchase Orders

It would be helpful to have a dedicated column in the Purchase Order screen that displays the total quantity of each product already on backorder or on order.

For example, if a product has 78 units already on backorder across multiple sales orders, this quantity should be clearly visible when creating a new purchase order for that product.

Currently, users need to hover over each item to check whether stock is already on order. This becomes time-consuming and impractical when creating large purchase orders containing 100–200 items.

Displaying the existing backorder or on-order quantity directly in a column would allow purchasing teams to quickly identify outstanding requirements, make informed purchasing decisions, avoid duplicate ordering, and manage replenishment more efficiently.