The only way I would use Sonos with Crestron is for it to be a non-controlled source and have the customers use their phones/tablets to control the Sonos player. Any other way you either get "Sonos broke the integration and now the TP won't connect" or you use the media player object and can only select the favorites stations stored within Sonos. I don't know what kind of "partnership" Crestron and Sonos has but it isn't one that benefits Crestron installers.

If you don't NEED AppleMusic then install a device that actually works with Crestron like Autonomics, Denon Heos, etc. If you need to use AppleMusic then do as I mentioned above and have Sonos as a source and control it using the Sonos App on your phone.