Invoice submitted by Supplier using supplier portal not appear in Transaction Console

Summary:

Supplier submit invoice without PO from Supplier Portal.

Not able to reassign this invoice to other user as this invoice not appear in transaction console.

How can we assign this invoice to other users as the user which got this invoice already resigned from Company

Content (please ensure you mask any confidential information):

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

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