https://wccftech.com/rejected-by-windows-11-time-to-get-windows-10-version-21h2-builds/

Microsoft has just introduced the next, and possibly last, version of Windows 10 - Windows 10 version 21H2. The first Preview Build is dropping today for Insiders whose devices couldn't meet the hardware requirements of Windows 11 and were pushed to the Release Preview Channel.

Windows 10 21H2 Insider Preview Build 19044.1147 is now available (KB5004296) to the Insiders in the Release Preview Channel. The Windows maker said that this build is only available for "Insiders who were moved from the Beta Channel to the Release Preview Channel because their PC did not meet the hardware requirements for Windows 11."