I don’t see any reason why I would not be able to install the Esoteric Soundstream app on the iPad as well, in case I want to bypass Roon for some reason, and use it to stream straight to the N 03T.
It may well be that someone who actually has done these things, rather than merely thought about them, has better advice.
It would be a good SQ test to compare the Soundstream going directly into the N-o3T. There has been much debate about the SQ of Roons app vs apps like MPD. I have always thought the MPD on my Bryston streamer sound a bit better than my Roons configuration.