I appreciate the effort in sharing your concern here with us, GalinMcMahon. Allow me to provide information when running reports in QuickBooks Desktop.
Reports inside QuickBooks Desktop (QBDT) depend on the source and targets inside your company file. QuickBooks follows the Sources and Targets concept to build company and financial reports. This means the data you see on every report is derived from the details of its source transaction.
With that, you may consider utilizing the Memo description feature on sales forms as a workaround to enable details to show when running a customer open invoice report.
Moreover, I'll include this guide if you want to export the report after you're satisfied with it: Export reports as Excel workbooks in QuickBooks Desktop.
I'll always be available in this thread if you require additional assistance running reports in your file. Just keep me posted below, so I can provide further help. Keep safe and have a good one!