We need the Fulfillment report (Order Report).
It will be under the Reports sections,
Log in to Amazon Seller Central
Visit Amazon Seller Central.
Go to Settings > User Permissions:
In the top-right corner of the dashboard.
Add a New Seller Central User:
Enter the email of the person who will pull reports, and send an invite.
Accept the Invitation:
Once the invite is accepted, return to the User Permissions page.
Assign Permissions:
In the Reports section, assign "View Only" or "View & Edit" access for Business Reports.