Hi there, 9gatesmysterysch.
QuickBooks Online is equipped with tons of different reports that you can use to get a snapshot of your business. You can run the Audit Log report for the transaction and filter it to show deleted/ voided transactions in QuickBooks Online.
Here's how to pull up Audit log report:
You can browse these articles to learn more about what the audit log can do and how to use it:
Let me know if you have any other questions. Have a great day, and stay safe!