I wouldn’t be surprised. I WAS surprised when I discovered the files simply didn’t appear in the folders when I searched them on my NAS, and it took a bit of experimentation to figure out how to play them.I'm sure my 203 plays DSD from my NAS
It seems odd to me that a file format would be recognized by one port but not another. I’m guessing it was an oversight, but I never worked at Oppo, so it’s just a guess.