Windows 10 Setup
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Setup: The procedures involved in preparing a software program or application to operate within a computer or mobile device.
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I see no way to get region and keyboard layout pre-selected. And the package has
<OOBE> <Desktop> <HideOobe>True</HideOobe> </Desktop> </OOBE>
So there is no keyboard screen during OOBE
Is the only way really to need to add autounattend.xml or Unattend.xml
WCD is really for packaging/provisioning UWP applications. Recommend using Windows System Image Manager to create the unattend.xml file, or create an OOBE.XML file: https://learn.microsoft.com/en-us/windows-hardware/customize/desktop/oobexml
Ofcourse I can do that, pity WCD can blow whole OOBE, but do not provide any settings