Out of curiosity - why do you want digital signal? From what I've read the default lightning - 3.5mm is properly good.
The almighty Ken Rockwell has a good writeup: https://www.kenrockwell.com/apple/lightning-adapter-audio-quality.htm
It’s ok especially for lossy spotify listening with a pair of bose noise cancelling, I use an audioquest dragonfly red for better headphones both with the phone and at the computer.
@Mr_Smyth started
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Out of curiosity - why do you want digital signal? From what I've read the default lightning - 3.5mm is properly good.
The almighty Ken Rockwell has a good writeup: https://www.kenrockwell.com/apple/lightning-adapter-audio-quality.htm