Serial Number tab not visible for Item with Predefined serial number generation

Summary:

Serial Number tab not visible for Item with Predefined serial number generation 

Content (required):

I have created a work order for item having Serial number generation criteria as Predefined.

However, the Serial number tab is not getting visible for the item while creating work order.

Where can I generate the Serial number for such item?

Version (include the version you are using, if applicable):

22C

Code Snippet (add any code snippets that support your topic, if applicable):