This allows you to define a key for your QMK keyboard which has some of the same functionality as the fn/Globe key on an Apple keyboard. Applying the following patch to your qmk repository creates a new keycode KC_GLOBE which can then be used in your keymaps.
This commit is updating @drashna's code from Nov 2023 to work with the Nov 2024 files.
- Apply the changes from this commit in full
 - Make sure rules.mk for your keyboard has 
KEYBOARD_SHARED_EP = yesor else Globe-E, Globe-Q etc. will not work. - Use 
KC_GLOBEin your keymap to define a key as the fn/Globe key and compile as normal. 
Alternatively if you want to avoid patching the generated header file, replace step 1. above with:
- Create thre new JSON file 
data/constants/keycodes/keycodes_0.0.4_basic.hjsonfrom the commit above - Run 
qmk generate-keycodes -v 0.0.5 -o quantum/keycodes.hin the root of the repo to update the keycodes - Apply the change to 
tmk_core/protocol/report.hfrom the commit above 
This will not make the key behave fully like the key on an Apple keyboard. Specifically more is required if you want it to toggle between F1โF12 and controlling brightness etc. See @fauxpark's gist for the long details.
I have the same problem with my nuphy air75_V2๐