No a music server per se only handles local files ( I am distinguishing between server and streamer here) . In the case of dCS, Mosaic is what provides the internet link to Qobuz. Although I have a Melco that is used as my server the internet connection is really just a pass through from the router. Of course if I used Melco’s function as a USB streamer ( as can the Taiko), then it would provide Qobuz via its own dedicated control app. However that would entail a USB rather than network connection to Vivaldi which would be retrograde.
However I did find that that adding the Melco S100 network switch made a significant improvement to Qobuz SQ affecting timbre, dynamics and soundstaging. I realise this is controversial but I was persuaded to purchase the S100 via a demonstration of it here in my own system within about 4 seconds - it was that obvious even given the supplied SMPS.