Yeah the problem with Apple Music is that is lossless but damn AirPlay is an utter mess of a thing so you struggle get that out. It’s why down the line I’m tempted to just dump the whole idea of a streamer and might just hook my iPad to a DAC directly and get the full lossless. I didn’t like tidal app and felt there were more gaps in its catalogue that other services, Qobuz is brilliant but also doesn’t have a connect and isn’t great with CarPlay and Siri. Sigh.
As to your streamer. With a good enough external DAC there definitely could be but but you’ve bought well, the new node x has an improved DAC over the original and it might cost a few pennies to improve on it.