I have a MacBook Air (M1, 2020) and one of the few things I don't like about it is that it does not have dedicated function keys for increasing/decreasing the keyboard backlight brightness. I know that I can control the keyboard brightness from the Control Center, and that I can place a brightness controller on the menu bar. I also know that I can use Karabiner Elements to remap existing function keys to keyboard brightness up and down.
But what I want to do is create custom keyboard shortcuts -- say, for example, Shift F1 and Shift F2 -- for this purpose, without eliminating the existing defaults.
Is there a way to do that, either using Karabiner or some other tool?