Adding Synced Aliexpress tracking number into auto email

We have set up auto emails and an email (Completed status) is sent as soon as the Aliexpress order is shipped and has a tracking number available. Now, this tracking number that gets synced from Aliexpress, we would like to dynamically add this into the auto email (Completed status). We use a plugin called Yaymail and we see a bunch of shortcodes we can choose from, for example order or customer details, to add into the auto email. But we do not see the tracking number. How can we add this into the auto email?

Thanks in advance and kind regards.