Thank you for posting here in the Community. I'm here to help run/create a report of your invoices sorted by product/service.
To open a report of your invoices sorted by product/service, you may need to run the Sales By Customer Detail report and make the necessary customization.
Click Report at the left pane.
Look for Sales By Customer Detail in the report's search field.
Click Customize beside Save Customization.
Select Invoice under Transaction Type.
Click Run Report.
Customize the date and run the report.
You can group the report by product/service by selecting Product/Service under the Group by drop-down arrow.
After following the steps above, you'll be able to run invoices report sorted by product/service. Feel free to add a comment below if you have any other concerns about running reports, we're always here to help. Have a great day ahead!