Macs map these to F13, F14, and F15. I remap those on the OS side to what I want with Hammerspoon.
So, you could map to "Cut/Copy/Paste". Not sure if that works cross-platform.
My current mapping of F15 is one of my favorites these days, it repeats the following key stroke (+ mods) n
times. Where n can be whatever you want.
Example:
F15, 4, 0, - outputs 40 dashes.
F15, 8, space 8 spaces
F15, 12, right_arrow moves 12 characters to the right, or nudges the selected graphic object 12 pixels to the right.
F15, 18, esc does nothing. Use esc to cancel if you change your mind.
'Luck!