If the keyboard supports backlighting, Windows can automatically adjust it based on room lighting on compatible devices.
Try this:
- Select Start > Settings > Bluetooth & devices > Keyboard.
- Turn on Change keyboard brightness automatically when lighting changes.
This automatic keyboard brightness setting is supported on these Surface devices:
- Surface Pro 8
- Surface Pro 9 with Intel
- Surface Pro 10 for Business
- Surface Pro 10 with 5G for Business
- Surface Pro for Business (11th Edition)
- Surface Pro (12th Edition)
- Surface Pro 12-inch (1st Edition)
- Surface Laptop 6 for Business
- Surface Laptop (7th Edition)
- Surface Laptop for Business (7th Edition)
- Surface Laptop 5G for Business (7th Edition)
- Surface Laptop (8th Edition)
- Surface Laptop for Business 13-inch (Intel)
- Surface Laptop Studio 2
If that setting is not shown, the device may not support automatic keyboard backlight changes.
For Surface keyboards, the Surface app can also be used to customize keyboard settings: open Start, type surface, open the app, select the keyboard, then choose Customize keyboard.