Extract ISO to C:\Unattended\WindowsISO\
Copy autounattend.xml to C:\Unattended\WindowsISO\
Download and install Windows 10 ADK.
http://go.microsoft.com/fwlink/p/?LinkId=526740
Or Windows 11 ADK.
https://go.microsoft.com/fwlink/?linkid=2165884
During install, only select: Deployment Tools.
Start "Deployment and Imaging Tools Environment" with administrator privileges.
oscdimg -m -o -u2 -udfver102 -bootdata:2#p0,e,bC:\Unattended\WindowsISO\boot\etfsboot.com#pEF,e,bC:\Unattended\WindowsISO\efi\microsoft\boot\efisys_noprompt.bin C:\Unattended\WindowsISO C:\Unattended\Windows.iso