Programming Apple system keys on Keyboardio M01

I’m growing to love my Keyboardio, but miss the ability to use the system keys (the ones on the f keys that you either hold fn to use, or not), such as LaunchPad.
Has anyone been able to define these and program their Keyboardio? I can get the scan codes using Karabiner-EventViewer, but don’t know how to define a key using the number. (All the key definitions in the program are symbolic definitions like Key_L.)

#keyboard #programmable #mechanical #ergonomic #arduino