How to reproduce:
1. Open the attached “IN-49290.zip” project
2. Open the “SampleScene” Scene
3. Enter Play Mode
4. Open the Console Window
5. Press FN+F13/F14/F15 on the Keyboard

Expected result: “Pressed F13/F14/F15” is logged
Actual result: Nothing is logged

Reproducible with: 2022.1.0a15, 2022.3.6f1, 2023.1.7f1, 2023.2.0b3, 2023.3.0a1
Not reproducible with: 2021.3.29f1, 2022.1.0a14

Reproduced on: macOS Ventura 13.4 (Intel), Windows 10 (User reported)

Notes:
- Reproducible on a new project
- Reproducible in Player
- Keyboard used: “Magic Keyboard with Numeric Keypad”
- Scripting Reference documentation shows that it is still present/supported: https://docs.unity3d.com/ScriptReference/KeyCode.html