Daniel, unfortunately over your home network (Ethernet wired or Wireless), it’ll top out at 16/44.1 - that’s the current limit for Airplay over networks.
In order to playback full high-resolution from any Apple devices, you have to (currently) connect via USB from your Apple device. In the case of an iPhone or iPad, it would involve the Lightning-to-USB adapter, then USB cable to your dCS kit’s USB port.