https://arstechnica.com/gadgets/2021/10/microsoft-prepares-another-major-windows-update-for-windows-10/

Windows 11 is out, but Microsoft isn't leaving Windows 10 behind just yet. The November Update for Windows 10 (also known as version 21H2) has rolled out to Windows Insiders in the Release Preview channel and is also available to download as an ISO file. Microsoft expects the current build, version 19044.1288, to be the same one that is released to the general public next month.