Following are the steps to create any version of ISO file
On the Windows 10 download page, download the media creation tool by selecting Download tool now, then run the tool.
In the tool, select Create installation media (USB flash drive, DVD, or ISO) for another PC > Next.
Select the language, architecture, and edition of Windows, you need and select Next.
Select ISO file > Next, and the tool will create your ISO file for you.
To use the ISO file as a backup for your PC or on another PC, burn it onto a DVD.
I hope this helps!