To Manage Orders,

1. Go to the Magento 2 Admin Panel.
2. On the left navigation bar, click Amazon Vendor Direct Fulfilment Integration.
   The menu appears as shown in the following figure:
   
3. Click on Manage Orders.
   The Order Grid Page appears as shown below:
   
4. To import the order click on the arrow next to the Import button and then on Search and Import. You will be navigated to the following page:
   
5. Under this enter the parameters- Order Id, Account, UnShipped, Shipped, the From and To date of the order you are searching to import.
6. The product will be imported.