I'll help you access the Advance Reporting feature in QuickBooks Desktop (QBDT), @Andrew81.
It could be that there's an issue with user access itself or within your company file. This is the reason why it's not showing in the Reports list in one of your users.
To test this out, you can create a dummy user account and check if it can access the report. Here's how:
Once done, provide the dummy account the same user access as Andrew and use it log in to your company file. Then, check if it can access the Advance Reporting feature.
If so, you can give the dummy account's information to Andrew and use it to access the report.
If you're unable to access the report, you can run the Verify and Rebuild Data tools in your company file. This will help you identify the source of the issue and fix it.
In addition, you can customize your reports in QBDT Enterprise. This way, you can easily focus on the details that matter the most to your business.
Let me know if you have more questions or concerns in QuickBooks. I'll be more than happy to help. Have a great day ahead.