I appreciate the steps you've taken, @drkoole. 

To add a product list to your purchase order form in QuickBooks Online, you need to enable the "Show Items table on expense and purchase forms" setting.

Here are the steps:

1. Click the Gear icon  at the top right of your QuickBooks Online dashboard.
2. Select Account and Settings from the menu.
   
   
    
3. On the left-hand menu, click the Expenses tab.
4. In the Bills and expenses section, click the Edit button.
   
   
    
5. Enable the "Show Items table on expense and purchase forms."
   
   
    
6. Click Save and then Done.
    

After completing the steps, you'll be able to view the Product list in the Item details section.
 

If there's anything you need, let us know. We're always here to help.