the property node in your image clearly shows the name "pages" and gives you an array of references.
Then use an indexing operation to get the reference for each page…
To get the "Page" property node inside to FOR loop you place a generic property node inside the loop and connect it with a wire to the "pages" property.
Have you tried this simple wiring operation?
I tried it and for some reason, it really works! Can you explain it to me why do I need to put FOR loop? If I don't put FOR loop, it will show an error.
The For Loop has an autoindexing tunnel so it indexes out each page element from the array of pages that comes ouf the the Pages property node.