Somewhat on the side - but is there a wireguard that works well for ReactOS? Does the windows version just work fine?

Just curious how/if the version support might work out for ReactOS.

Good question! I've never tried. The NT driver makes use of some of the more advanced features of the networking stack, so possibly not. But you never know. I'd love a Wg4React.

ReactOS was, at one time, targeting a Windows Server 2003-level of compatibility. With that in mind I can't imagine current Wireguard would have even a shred of hope of working on ReactOS.