Normally, if you are unable to boot into Windows and cannot access your files, you can create a bootable drive and use the media to boot and repair your OS installation. Perhaps, not widely known by ...
Although, Windows 10 can detect the Keyboard layout of your MacBook, yet, you may not be able to use the Function keys (F1-F12). Moreover, the brightness of the backlit keyboard may not be set at all.
Ventoy is the ultimate multi-boot USB drive creation tool, in my opinion. I also use PINN, a similar tool for my Raspberry Pi OS installs, but that's for installing multiple OS on the same disk drive.
Secure Boot aims to protect your PC from malware that tries to sneak in as your PC boots up. Here's how to activate the feature if it's not already enabled.