Apple never released Windows 11-specific drivers. This creates several notable gaps:
After installation, a gray Boot Camp icon will appear in your Windows 11 system tray (bottom right corner). Click it to open the to adjust: Bootcamp Drivers Windows 11
Look for the grey square Apple icon in your Windows 11 system tray (bottom-right corner). Clicking this opens the Boot Camp Control Panel, allowing you to change the default startup disk, adjust keyboard backlighting, and configure trackpad tap-to-click settings. Apple never released Windows 11-specific drivers
To fix this, you can install an open-source driver called : adjust keyboard backlighting