Function keys do not work properly with certain keyboards on macOS

[unilock]

Minecraft Version: 1.20.1, 1.20.4, 1.21.1

NeoForge Version: 47.1.106, 20.4.237, 21.1.77

Logs: 1.21.1: https://gist.github.com/unilock/a699a9ebba05e3da37dbb5759e381f16

Steps to Reproduce:

1. Install Minecraft 1.21.1 + NeoForge on macOS
2. Attempt to bind a key to a function key (F1, F2, F3, ...)
3. The key is bound as "Not Bound" instead

Description of issue:
The function keys (F1 thru F12) can't be used with keybinds (they always end up as "Not Bound"), and the debug keybinds (F3+x) just bring up the debug overlay instead of... debugging.

I assume this is because "F3" on macOS is technically "fn+F3" ("fn" being a separate key). I guess NeoForge detects the "fn" instead of (or before) the "F3", and treats it as an unknown key - thus "Not Bound".

Interestingly, editing options.txt to bind a function key results in that keybind working fine in-game.

All of this works without issue on both vanilla and Fabric.

[covers1624]

Hardware: M4 MacBook Pro.
OS: macOS Sequoia 15.1
Vanilla/Neo: 21.1.77
Java: Eclipse Adoptium 21.0.5

I tested with and without the macOS Use F keys as standard function keys setting, Settings -> Search (Function Keys) -> Use F keys as standard funtion keys.

On Vanilla, I am able to bind and use F key bindings as expected. Except for F3 + H in macOS function key mode, this always does a special action.

On Neo, I am able to use F key bindings as expected with the same semantics as Vanilla. Binding I am unable to set F keys only if I have FN held down prior to clicking on the key to rebind. Otherwise, it works as expected.

[unilock]

I have the "Use F1, F2, etc. keys as standard function keys" setting turned off, for what it's worth. Turning it on allows everything to work properly - but that's not an ideal solution for me...

Even in vanilla, F3+H doesn't work properly with the aforementioned setting disabled, so I guess that's not NeoForge's concern...