#3 CRM/QB to Books Migration: How to show Serials on Invoices?

#3 CRM/QB to Books Migration: How to show Serials on Invoices?

Trying to migrate from CRM / Quickbooks to CRM / Zoho Books / Inventory...

Query #3
I've enabled serial number tracking and selected "Track in Packages, Purchase Receives..." option (Books>Settings>Preferences>Items>Choose Tracking). 

How do I show serials on the customer invoice?
I've created a package from the Sales Order and added the serials. The invoice has been created. I would expect the serial number to show on the customer invoice.

Expectation:
Serial Numbers to show on the customer invoice.

What happens
No serials show even though I've enabled the "Show Serials" on the invoice template (Books>Settings>Templates>Edit)

Appreciate any guidance on how to enable this feature.

Thanks in advance