The X.Org Foundation governs the X Window standards for Unix/Linux desktops, which evolved from XFree86 implementations. Hummingbird's Exceed and AttachmateWRQ's Reflection are commercial X Window ...

but those things will be duplicates of what you will want to install under WSL. I suggest you get the X server running first and test it out from another Linux machine or a virtual machine.

An open source graphical windowing environment for small devices typically running under Linux. Similar to the X Window system, it is designed for limited amounts of memory and storage.