Why “Dead End” or Dummy pages?
Because it’s not finished yet!
Here’s one page that is fairly complete: Long Covid Clinic – What you Can Do
Where there is content:
The menus are only partly populated at the moment, and the structure is likely to change, with additional sections appearing below those you see already. If not obvious, the most important part of the navigation menu is the dropdown arrows. When you click on these, they take you to more pages.

The arrows in the menu above will expand if you click or hover on them to show the featured article pages below, which are well populated in most cases:

Despite the section below expanding to some interesting sections, there is nothing in there to see yet. In fact most of the main heading pages on the menu don’t exist yet – They will serve as introductions to the content populated further below. The content is being built from the bottom up, as it were.

