How to create an Exhibit page with subsections

Creators are creating a page with multiple subsections. They add blocks (File -text block) instead of using subpages. We need to create a navigation menu that shows the parent page and the subsections under it. Block also comes without a title field.


Page 1
 Block 1
 Block 2
Page 2
 Block 1

They are not interested in creating subpages bc they want to have linear experience when reading the information.

Any thoughts are appreciated.