Windows 10 Versions 1903 and 1909 support WLS2
You can check if you have this backport by verifying the minor build number of your Windows build. To do this, right click on the start menu, click ‘Run’ and then type in ‘winver’ and hit enter. The first number before the
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is your major build number, so for version 1903 this will read 18362. The number after the.
is your minor build number, and this will let you know whether you have the backport on your machine. This backport has the minor build number: 1049. To summarize, if your minor build number is 1049 or higher on Windows builds 18362 or 18363, then you have the backport and the ability to run WSL 2 distros.
Detailed installation/update instructions can be found in the official documentation.