Apparently, the Windows 10 21H2 release will also find its way to the consumers in October.
The final build of Windows 10 21H2 will be build number 19044.1237. The Windows 10 21H2 release is just a small feature update KB5003791, so don’t expect any big visual changes like in Windows 11 is the case. Windows 10 21H2 will be supported until October 2025.
After this date, you will have to make the switch to Windows 11 or another operating system.