Hi, @Neil Desai
Thank you for posting in Microsoft Q&A forum.
Based on my experience, you may try to use MDT to accomplish the OS upgrade, here is the step by step guidance for MDT:
https://learn.microsoft.com/en-us/windows/deployment/deploy-windows-mdt/get-started-with-the-microsoft-deployment-toolkit
And the guidance to perform an in-place upgrade of Windows 10 with MDT:
https://learn.microsoft.com/en-us/windows/deployment/deploy-windows-mdt/upgrade-to-windows-10-with-the-microsoft-deployment-toolkit
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