When the order gets placed by the customer, then the admin can ship the product and generate the invoice of that product. The Ship button is available to ship the order and automatically allots the AWB Number if that order has delhivery shipment enable.
When shipment is generated, tracking number automatically gets assigned to that order. Admin can generate manifesto and can download pdf of that manifesto.

When the admin Mark the order as SHIP from the admin panel, then a TRACKING NUMBER (AWB NUMBER)  is automatically assign to the order and even admin can create the Shipping Label.

Creating Shipment Label