I’d be pretty surprised if it didn’t work with Studio One because Presonus worked with Celemony to create it. I don’t think it really needs documentation at this time - there would be very little in there. And to be fair, Steinberg have produced a document of what isn’t working in ARA2.
It’s got a way to go yet, but I’m happy that they’re working towards implementing it… and the latest update is already much better than the initial implementation only a few months ago.