Hi,
The only public download on microsoft.com is the latest version(2020).
https://www.microsoft.com/en-us/software-download/windows10
Other options may be the volume licensing center or via visual studio subscription downloads (assuming you have access).
Also, you could refer to the following link:
https://wccftech.com/how-to/how-to-download-older-windows-10-versions-iso-files/
Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.
Hope above information can help you.
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