You can run i3 via WSL if you use an alternate X server like X410 or vcxsrv instead of the built-in wayland RDP bridge thing. vcxsrv is a bit nicer, since it lets you run the X display in fullscreen mode.
I don't know anything about WSL, but if it has a wayland server like you say and if 22SAS wants to use i3, they could try sway with the wayland backend.