Hello there, @Dee08.
Thank you for providing the QuickBooks version you’re using. I can walk you through the steps in viewing the Audit Trail Report.
This report shows all activities done on the company file with the name of the user who performed it. You can view the changes made on the bank reconciliation by following the steps below.
Here’s an article about customizing reports for more information: Customize reports in QuickBooks Desktop.
Once done, you should see if someone changed the status of the reconciled transactions. If so, redo the reconciliation.
Check out the following articles for reference:
That should get you pointed in the right direction.
Leave a comment below if you have questions, I’m always here to answer them. Have a good one!