and I want to know can this done automatically?, I used shipstation to process my store shipments and the shipstation’s plugin is the one triggering in woocommerce to send the completion email. But in the email content there is no tracking number added, and in the order page, in the notes section you can see the tracking number is there:
Yes, using our plugin you can definitely attach the tracking number in the order completion email. For the orders, you have done, as soon as the order is marked as completed, the tracking number will go along with the email.