I just signed up for a 2 week trial of Roon just because of this issue and to share in this dialogue here, hoping to find a fix!! (Plus, it does give me a chance to see if I like it better than my current setup.) I have FiiO’s Q5 and use Onkyo’s HF Player app on my 2020 iPad Pro 11”, as well as my iPhone X. Works PERFECTLY on iPhone X. The Onkyo app upconverts my FLAC files to DSD and the DSD lights up on my Q5. SAME SETUP on my iPad, but it plays out as PCM 384Mhz. No DSD!?! I can literally swap between the 2, playing the same song and everything, but no DSD on iPad. OS is up to date on both and everything. I’m sure it’s an issue with Apple and their USB C implementation!! I’ve even tried a couple of different USB C adapters, to no avail!