https://www.bleepingcomputer.com/news/microsoft/microsofts-killing-script-used-to-avoid-microsoft-account-in-windows-11/

Microsoft has removed the 'BypassNRO.cmd' script from Windows 11 preview builds, which allowed users to bypass the requirement to use a Microsoft Account when installing the operating system.

This change was introduced in the latest Windows 11 Insider Dev preview build, which means it will likely be coming to production builds.