If on Cdiscount, you have unchecked the option to automatically accept orders, then the "Accept Pending Orders" button allows you to do so. Be careful, even after accepting the order, you must import it on Prestashop using one of the following buttons.

Allows you to manually import orders from Cdiscount. The button "view pending shipment orders", displays without date limit the orders pending shipment.

The top right button allows you to display the last 15 days of orders whatever the status.