Hi,
To reinstall Windows 11, you may use Settings. Launch Settings > System > Recovery. Under "Fix problems using Windows Update", select Reinstall now.
This does a repair installation, keeping your files, apps, and settings.
More info:
Let me know if that helps. Another method to repair install Windows 11 is using the official ISO, which you can download from the Microsoft website → https://www.microsoft.com/en-us/software-download/windows11