Thanks Zorem. Have made a Printful shipment and AST has entered tracking number to the module in Edit Order page. The confirmation email sent out includes a shipment section but the Track Your Order link and tracking number link seem to be blank …
<a class="tracking_number" href="" target="_blank" style="font-size: 14px; line-height: 19px; display: block; margin-top: 4px; color: #202020; font-weight: 400; text-decoration: underline;">FN240232652GB</a>
<a href="" class="track-button" target="_blank" style="background: #f8a400; padding: 10px 15px; display: inline-block; border-radius: 3px; margin-top: 2px; text-align: center; min-height: 10px; white-space: nowrap; font-weight: 400; text-decoration: underline; color: #000; font-size: 14px;" bgcolor="#f8a400">Track Your Order</a>