Having a remote control command won’t necessarily address what you’ve already stated, since some of those depend on window focus, anyway.
How come the project cursor moves in the Score Editor while its window is not in focus? But anyway, I’m asking for a function that would replace autoscroll with “manualscroll” (or MIDI controlled scroll). Autoscroll makes the Score Editor to display the next page when the project cursor reaches the end of the last measure in page, but how about mapping this action (that autoscroll has) to a user key-command assignable function?