An advanced request (as of 2019).
I’d love to be able to open up the same doc in 2 split views, then go into Arrange mode on both, and then move items from one view to another.
This could actually be the better way to do Arrange, rather than dragging an element up/down while the page scrolls.
But I know you mentioned that having the same doc opened in split-view is risky right now. Once that’s solved, then maybe this request could be on the backlog.