Make some top level menu links actual links
The menus need to have top level links that go to content. I keep finding themes that change top level links to #. I assume it's because the test data does not have actual top level links, so authors don't realize that they can be.
Maybe the link could say it's a link or somehow mention what to check for somewhere.
This is a common menu pattern. It has nothing to do with the test data, more likely it is because of the popularity of so called "mega menus". Authors can decide what kind of menu they want.
What are you saying? I don't understand. The issue is that the test data does not include both types of menus, and it should, so that authors know that they cannot willy-nilly change the top-level links of the user's menu.