https://wccftech.com/patch-tuesday-windows-10-update-is-out-for-windows-10-version-21h1/

Microsoft has released this month's security updates for Windows 10. Today's Windows 10 cumulative update is available for all supported versions of the operating system, including version 21H1, version 20H2, and version 2004 (all of which share a common core operating system and receive the same updates).

Windows 10 update KB5005565 is available for these latest three versions of the operating system. Build 19041.1237 is available for version 2004, Build 19042.1237 for version 20H2, and Build 19043.1237 for Windows 10 version 21H1.