macOS lets you assign an action to the 🌐 (globe) key:
This setting works on a modern keyboard with combined 🌐 fn key:
But my first-generation Magic Keyboard doesn't have the globe symbol on its fn key:
This seems to be more than just a visual difference. On my Magic Keyboard, it only works as a plain fn key, and the action assigned to the 🌐 key ("Show Emoji & Symbols") doesn't work.
Is there a way to have the first-generation Magic Keyboard's fn key act like a modern 🌐 fn key?