Hi @J.A,
At this time, Oppo UDP-203 cannot stream DSD/Multichannel content via Roon Ready, you can read more regarding this limitation in the following thread: OPPO UDP-203 and UDP-205 now Roon Ready.
As far as I’m aware, you are able to stream DSD content via USB and multichannel via HDMI but can’t stream multichannel DSD content via USB nor HDMI. I hope this helps!
Thanks,
Noris