You need to sign in with your insider account to download the ISO images. You can click on the link below to download the Windows 10 version 21H2 insider ISO images. Now, it has also made the official Windows 10 version 21H2 (19044.1288) ISO images available to download. It has also released Build 19044.1288 to the insiders in Release Preview Channel. Microsoft today confirmed that the Windows 10 version 21H2 Build 19044.1288 is the final public release build.
You can refer to our tutorials on how to create a bootable USB drive and how to do a fresh Windows 10 installation using the ISO image. You can download ISO files for any Windows version (7, 8.1, 10) by clicking here. You can read all the changes and new features that Windows 10 Version 21H2 update brings with itself by clicking here.