Microsoft released a new Windows 10 Insiders preview build to the Dev Channel users. Just like the past few builds, this build is also being delivered from the CO_Release branch to the insiders. At this moment, there's no comment from Microsoft regarding the next feature update of Windows 10 version 21H2.
The latest Windows 10 build 21387 includes no new features, but it removes two existing features from the operating system. Apart from these, Microsoft adds some fixes to the OS. For more details, continue reading further.