Sorry, I did a poor job of explaining my question.
Yes, my Oppo does play multichannel SACD. What I like to do is stream ripped stereo and multichannel FLACs and DSD files from my network attached music library. The Oppo does stream them, both stereo and multichannel. You control it either by the Oppo remote control or by the Oppo app on my iPhone. The Oppo app is a bit unpredictable and does not allow me to create playlists.
The HEOS app that I use on my Marantz SR5013 receiver works very well and is easy to learn. It lets me build playlists but, even though the receiver is a home theater receiver that does multichannel very well if played from a disk or through my Oppo, the HEOS app doesn't stream multichannel.