To mark and navigate specific passages :
Else, to have a continuous read (all those passages in a Scrivening), split your documents in smaller sections containing those passages of interest, then use collections created manually, or off of the result of a later search for a specific tag.
After reading your post a second time, I think I see exactly (or pretty close) what you actually want. But Scrivener doesn’t handle it internally. You have to do it manually.
There are more than one way to do it.
I linked to the way I do it above.
In that same thread I linked to, @AmberV links to (or explains in that one thread, I don’t remember) his own way to handle this.
AmberV created the brick that is the manual. Both for Mac and Windows. You can trust his approach to work.
Mine works pretty well too.