Thanks and yes, I used the same workaround of having dummy modules as you mentioned. Can you please confirm one thing -
There is no option to drag the page selectors on a page and re-arrange them. Also, the page selectors do not get arranged in the order their corresponding modules are added to the page. So what drives the arrangement of the page selectors on the top?
1 Not in a pages, but you could add "Additional insights" - supportive grids for a worksheets which could be expanded/collapsed by a click
2 No. Would text instruction work?
3 If you would like to publish a parent hierarchy - you could publish a navigational grid. Or as a workaround you could hide all rows/columns to see like clean card. In this case you would see additioanl page selector for your parent hierarchy.
I would not promote to use this approach, as massive amount of selectors could confuse end users.