Magic Keyboard Touch ID volume and brightness keys not working on iMac 27” Late 2012 (Monterey, OpenCore) – alternatives?

Hi everyone,

I’m using a Magic Keyboard Touch ID with my iMac 27” Late 2012 running macOS Monterey with OpenCore, and I’m trying to remap keys or make the volume/brightness keys work.

I’ve tried Karabiner-Elements, but none of the keys respond at all.

Is there another way or a different tool to get these keys working?

Thanks in advance for any advice! 🙏