Yea, I know you can configure it, but by "proper", I mean that it is automatically configured, and that the buttons can automatically change their action depending on the context. I believe it works this way in the Steam version of the game, but when I tried a few months back, it didn't work that way in the GOG version.
Even then, though, it does not qualify as "proper support" if this means "native support". It's just like using steam controller for any game that has no controller support : you configure it to emulate keyboard and mouse (but it's still a good experience for NMS, once done).