Explanation
When initially deploying new Windows devices, Windows Autopilot leverages the OEM-optimized version of Windows 10 that is preinstalled on the device, saving organizations the effort of having to maintain custom images and drivers for every model of device being used. Instead of re-imaging the device, your existing Windows 10 installation can be transformed into a "business-ready" state, applying settings and policies, installing apps, and even changing the edition of Windows 10 being used (e.g. from Windows 10 Pro to Windows 10 Enterprise) to support advanced features.
Reference:
https://docs.microsoft.com/en-us/windows/deployment/windows-autopilot/windows-autopilot