You can delete Amazon DSP orders as long as they have not yet gone live.

This statement is false. Once an Amazon DSP order has been submitted, it cannot be deleted, regardless of whether it has gone live or not. The system is designed to maintain a record of all submitted orders for auditing and reporting purposes. If changes are needed before an order goes live, you can pause the order, edit its settings (like budget or targeting), or cancel it. However, a submitted order can never be fully deleted from the system.