WSL2 will be generally available in Windows 10, version 2004 

WSL2 will soon be officially available as part of Windows 10, version 2004! As we get ready for general availability, we want to share one additional change: updating how the Linux kernel inside of WSL2 is installed and serviced on your machine.

情報源: WSL2 will be generally available in Windows 10, version 2004 | Windows Command Line

WSL2が遂にGAとなりました。