The utility is being phased out of Windows 11 as part of a long-term deprecation plan by Microsoft.
Last tested on Windows 11 Pro (22H2) with WMIC Feature on Demand installed. wmic download windows 11
Instead of relying on deprecated WMIC, use modern, supported methods for file downloads in scripts: The utility is being phased out of Windows
If you're looking to download Windows 11, here are the general steps and information that might be helpful: wmic download windows 11