Here is an article about it by well-respected Andre Da Costa...
https://www.groovypost.com/howto/download-iso-older-versions-windows-10-iso-files/
How to Download ISO Files or Reinstall Files for Older Versions of Windows 10
Note: That is a 3rd-party site. Informative - but I know nothing (good or bad) about any downloads or links that may be there. Andre is well-respected, though.
I've never needed to try it, myself.
Edit: Remember you must download the same
Edition (Pro, Home, etc.) that you've got a license to, or be forced to purchase a new license. So, you need the Pro edition, & it is good to match your
Architecture too - that's x64 for you.