Can you scroll two editing windows simultaneously?

Or not?

I’m using vertical split-screen view.

Moderators - could someone please take a look at this question for me?

Not a moderator, but no, you can’t. The question has been asked before—though I think it was a long time ago—and the reasoning why not explained. But maybe one of the team will be along and give a fuller answer, though they’re probably busy dealing with iOS related requests and support.