Apple Magic Keyboard Eject key is 'Eject 0xB8 of Consumer Page 0x08'. https://verityj.github.io/2023/06/17/eject.html

TMK KC_EJCT and AC_EJCT is actually 'Stop/Eject - 0xCC of Consumer Page 0x08' as of 2024-03.

How do Windows, Linux and Mac recognize the keys?

Can we replace 0xCC with 0xB8 simply?

Anyway, 0xB8 consumer key is need to be available on TMK.

BTW,
HHKB pro/pro2(PD-KB300/400) uses 'F20 - 0x6F of Keyboard Page 0x07' for its Eject key(Fn+f). #250

HHKB classic(PD-KB401) uses 'Eject - 0xB8 of Consumer Page 0x08'.

https://github.com/tmk/tmk_keyboard/wiki/FAQ-Keymap#eject-on-mac-osx