I can confirm that bluetooth settings can detect and connect to Microsoft's Universal Foldable Keyboard on r158 on my Pro 5. However, the disconnect when turning off the keyboard is not clean as system doesn't display the OSK until after a reboot.
I can confirm that bluetooth settings can detect and connect to Microsoft's Universal Foldable Keyboard on r158 on my Pro 5. However, the disconnect when turning off the keyboard is not clean as system doesn't display the OSK until after a reboot.