Sales Order Demand Not Captured Due to Inventory Shortage

Summary:

While creating a sales order with insufficient quantity, the reservation process encounters an error, and the requested quantity does not appear in the Demand column of the Review Item Supply and Demand section. I would like to understand how to either:

1. Backorder the requested quantity so it reflects appropriately in the supply and demand review, or
   
2. Customize the orchestration process to ensure that even unreserved quantities are captured in the Review Item Supply and Demand section.

Please note that we are using an orchestration process with a reservation step without a schedule.

Any guidance or suggestions on how to address this scenario would be greatly appreciated.