The Shipping Confirmation email does not include the tracking number or tracking company, how can I add it?

Adding a tracking number to the email is beyond the control of Fulfill Sync. To do this, you’ll need to change the settings in your Shopify admin(Settings > Notifications > Shipping Confirmation) to include the attributes. The available attributes can be found here: https://help.shopify.com/manual/sell-online/notifications/email-variables#fulfillment-properties