WSL is a feature in Windows 10 and later versions that allows users to run Linux programs natively on Windows, without the need for a virtual machine or a dual-boot setup. With WSL, users can install a Linux distribution of their choice, and access the Linux command-line interface directly from the Windows terminal. This allows for easier integration between the two operating systems, making it possible to develop and test Linux applications on a Windows machine. WSL has become increasingly popular among developers, as it provides a convenient and efficient way to use both Windows and Linux tools and workflows simultaneously.
<Distro> is the name of the distro you want to import it can be anything you want,
<InstallLocation> is the path where
ext4.vhdx which contains your linux file system,
<FileName> is the tar export of distro you want to use as WSL.
Then you can simply import the tar file to get your own Arch WSL