Downloading a specific older version of Windows 10, like version 21H1 (May 2021 Update), can be tricky because Microsoft typically only provides the most recent version (currently 22H2) on their standard download pages.
How can i download older version of Windows(Version 1909) iso file . Download Win10 21H1 32Bit iso
Organizations with volume licenses can access older versions through their VLSC account . Community-Verified Workarounds Downloading a specific older version of Windows 10,
Log in to the Visual Studio portal to search for and download 32-bit ISOs for specific builds like 21H1. like version 21H1 (May 2021 Update)