Apple lossless on Pi setup with Volumio

Hi all, I was just wondering if anyone succeeded in making Apple lossless / HD work om a Pi+DAC-hat combination, using the digital output of an iPhone/iPad. Apple describes the use of this route in a generic way. One needs an ‘Lightning to USB camera adapter’ and an external DAC. So far, I only heard of people who got this working with USB DACs (Dragonfly) or Toppings, but still no experiences were shared about more DIY setups, like RaspDAC Mini or the likes. I would appreciate any comment, also id this is not possible for any technical reason. Thanks! BW Martin