... just as a hit:
The Termius iOS APP has a nice solution regarding the cursor navigationen within a shell.
You just have to swipe up and down / left and right on the terminal screen.
And by the way double-tab on the screen is "TAB" e.g. for command completion.
But I don't know if this fits into your overall UI/UX concept.
Customer support service by UserEcho
... just as a hit:
The Termius iOS APP has a nice solution regarding the cursor navigationen within a shell.
You just have to swipe up and down / left and right on the terminal screen.
And by the way double-tab on the screen is "TAB" e.g. for command completion.
But I don't know if this fits into your overall UI/UX concept.