Microsoft deployed cumulative update KB5003214 for use on Windows 10 21H1, 20H2, and Windows 10 2004.
Support notes aren’t available yet at this moment for this new cumulative update. With us, it activated news and interest after already being on Windows 10 21H1 build 19048.985 for a while without seeing this new feature active.
Your build number will be 1904x.1021 after installing this new cumulative update.
If you don’t know how to install .cab files, you can download this Reg tweak to create an install.cab file context menu item that does all the work for you.
Download: KB5003214 All versions
or KB5003214 Rev. 2 – 19043.1023