A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Dear Mike,
Good day! Thank you for posting your query in our community.
Per your description, you want to check if the Table/Query is a source in other workbooks.
Based on my research, currently, there is no built-in feature could meet your requirement(we can only open the workbook to check the existing source in this file now).
And I will keep this thread open, so that other members in our community could share their ideas in this thread.
Thanks for understanding.
Sincerely,
Jazlyn | Microsoft Community Moderator