Ipad external keyboard shortcuts. allow arrows and display shortcuts

1- I am using actions to move items (up, down, left, right) in lists, which is very useful, and I assign a keyboard shortcut to each action.
I would like to assign the shortcuts Opt-Ctrl - arrow (R,L,up,down) which is very easy to remember and which I use on my Mac.
The otherwise very useful external keyboard shortcuts do not accept arrows.
2- in the actions list it would be nice to have the option to display the shortcut next to the action name. (I know that I can display the shortcuts by pressing Cmd, but it is less convenient because I have to scroll through pages of shortcuts.
thank you