How do I use AirPlay to stream deezer and Apple Music or Spotify to Nucleus which is connected to Hugo TT2?
You can’t. Nucleus runs Roon core and Roon core can play local files, Tidal, and Qobuz.
Check out the tinkering section, because this functionality is only made possible by genious and generous members in the community.
What you need to set up is …
Extension manager
and the extension …
Entrypoints