You can find indexes of Windows 10 ISO files from various sources:

Before you burn or deploy your ISO, check the index. Here is how to do it in Windows (no third-party software required):

The Windows 10 ISO Index is more than just a technical footnote; it is the roadmap to the contents of your installation media. By learning how to read the Index using DISM, you gain full control over your Windows installations, ensuring you deploy the exact edition you need without bloating your USB drives or risking installation errors.

: Extracting a specific edition (e.g., converting a single Pro index from an ESD to a standalone ISO). Downloading a Windows 10 ISO