Ability to search item category from a browsing category using Non-Catalog Requisition

Summary:

Is it possible to search item category from a browsing category using Non-Catalog requisition?

Content (required):

We are using smart forms - and there are two Smart forms (for Quantity based & Amount based PR) for each of the 140 BUs.

So, creating Hierarchy for each smart form would also be high maintenance. Attaching previous Doc ID below for reference.

Thank you,

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

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