Then it is almost amazing, because in a phone (and termux) your fingers are the mouse.
You can do scrolls with youres fingeries too, if you add
(global-set-key (kbd "") 'scroll-up-command)
(global-set-key (kbd "") 'scroll-down-command)
Somebody should study howto turn long finger press into emacs cut/paste. Now it is regular Android cut/paste, which is little cumbersome.
It's insert-mode only but well-worth giving a whirl for faster edits.
I think even notepad has it actually, in insert mode. I can't imagine that Linux doesn't have something similar.
set virtualedit=all
which allows cursor to be moved anywhere in normal mode