https://wccftech.com/microsoft-releases-windows-11-feature-for-windows-10-21h2/

Windows 10 21H2 Build 19044.1618 (KB5011543) is now available for Insiders in the Release Preview Channel who are currently running Windows 10 version 21H2 (also the latest public version). Today's release brings Windows 11's Search updates to the older desktop operating system along with several other improvements and fixes.

We recently introduced an update for Search in the Windows 11 Insider Preview that highlights interesting moments in time. This feature, search highlights, is now coming to Windows 10. We are taking a phased and measured approach and broad availability will occur in the coming months.