WIM(Windows Imaging Format) file can contain one or more images based on how it was prepared. The Operating System ISO file provided by Microsoft will have WIM file with several images init for different versions of operating system. The purpose of this post is to show you how to see the images inside it.
In this case ISO file is mounted to D: drive so the path of Install.wim file is D:\Sources\Install.wim
Get-WindowsImage -ImagePath D:\Sources\Install.wim
This will list images inside the ISO file. The output of above command gives output similar to below.
Hope this helps.