Welcome to the Community, @steven_dennis.
You can run the Budget Overview report from the Reports menu in QuickBooks.
Also, you may want to run the Budget vs. Actuals report to keep track of your actual income and expenses compared to your budgeted amounts. Here are the steps how:
Then, you can customize it to personalize its details and formats. Check out this article for the steps on how: Customize reports.
Technically, you should be able to see both parent and sub-expense account in the report. You'll only need to make sure you're using the correct Budget template, Report Period, and the Accounting method.
Also, you must review each transaction you have created and make sure it uses the correct expense item. This way, the amount will be broken down on the report based on the expense account used.
Please let me know how this goes for you. I'm here if you need further assistance with your budget report. Have a great day!