ISP - Notification to Requestor for PO based invoice

Summary:

How to enable notification to business user ( Requestor ) for invoice submitted in supplier through supplier portal?

Content (please ensure you mask any confidential information):

Dear Team,

The concern from client have raised regarding notification to be raised to business user ( Requestor ) for invoice submitted in supplier through supplier portal .
Please provide the details steps to achiever this problem.

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

23C

Code Snippet (add any code snippets that support your topic, if applicable):
SR 3-37936777488 : ISP - Notification to Requestor for PO based invoice