I play 99% on mobile and have for over two years. I JUST found out that there is a keyboard shortcut to call up a player's stats and also a way to write notes for sectors in the navigation HUD. As far as I can tell, these are non-existant features on mobile. Is this true?

If the features do not exist I will repost this thread into suggestions.

Why did you resurrect a thread that was 5 months old?

Mission notes are not the same thing as Sector notes. There is still no way to use sector notes on mobile by default, but you can use the SectorNotesButton plugin to access it.