Microsoft has confirmed that support for Windows Subsystem for Linux 2 (WSL 2) was backported to version 1903 and version 1909 of Windows 10. Developers have worked over the last few months to bring WSL 2 to those versions of Windows 10 and did so thanks to customer feedback from users who have enjoyed using it.
WSL 2 is a new version of

Source: Hot Hardware – Microsoft Backports Windows Subsystem For Linux 2 To Windows 10 1903 And 1909