In Shadowlands, WoW client now has gamepad compatibility. You can keybind gamepad buttons. But when I tried Neuron, I couldn't bind them. It would be a great improvement to add them to the Neuron keybinding options!

wow now has native gamepad support. binding your logitech keys to f1-f12 is no longer necessary.

i highly recommend getting the consoleport addon. it custom tailors the wow gamepad experience and takes it from being just an afterthought the devs put in the game for accessibility to actually feeling like the game was made to be played with a controller.

are the keypad buttons non-standard keys? My logitech G13 is all set to being F1-F12. Are the keys weird ones like G1/2/3 etc?

The keys for gamepad are:
PADDUP
PADDRIGHT
PADDDOWN
PADDLEFT
PAD1
PAD2
PAD3
PAD4
PAD5
PAD6
PADLSTICK
PADRSTICK
PADLSHOULDER
PADRSHOULDER
PADLTRIGGER
PADRTRIGGER
PADLSTICKUP
PADLSTICKRIGHT
PADLSTICKDOWN
PADLSTICKLEFT
PADRSTICKUP
PADRSTICKRIGHT
PADRSTICKDOWN
PADRSTICKLEFT
PADPADDLE1
PADPADDLE2
PADPADDLE3
PADPADDLE4
PADFORWARD
PADBACK
PADSYSTEM
PADSOCIAL

To enable gamepad type /console GamePadEnable 1

Hopefully this is helpful, because Neuron looks like it would be an ideal way to make custom gamepad hotbars very easily! The only issue is the inability to bind the keys.