Arc playing to WiFi sources using RAAT?

Hi there. I have been using ARC and love it. But now I have a new challenge - just moved into a new office. ARC loads fine and attached to my Rock at home, so ports not an issue. But:

I have a Naim Muso wired into office network, and iPhone Wifi onto the same network. The speaker is visible to the Naim app, as well as the Qobuz app, over the network (bluetooth disabled), and I can play hi-rez no problem.

However in ARC, I can only airplay, so no hi rez. I’m not sure does ARC support RAAT over a WLAN (away from Rock). I have the same speaker at home and RAAT works flawlessly from the Rock to the Muso. But from ARC to the Muso, only Airplay works. What am I missing ?

True in principle, however, the Naim Mu-so has no suitable USB input.

RAAT is RAAT and ARC has other goals, it’s mainly a mobile player for phones.

However, the Mu-so is an all-in-one convenience speaker. It’s great for what it is, but it’s nothing more. I really wouldn’t get hung up on hi-res.