For SuperDirt I use the multi-channel approach as @qaciwq links to above, for my SC startup. I target the Blackhole audio device on MacOS and then my DAW can listen to the Blackhole inputs from a MacOS Aggregate Device. So basically I do DAW multitracking on d1, d2, d3, etc.
There's another thread somewhere about what these startup.scd configs should be to get mono outputs per orbit, stereo per orbit with multiple outs, etc.
These supercollider outputs have to be configured during startup to get individual mono/stereo outputs per d1... outputs.
I would like to add for everyone else specially on Windows there's also the option to set many Recorders on SuperCollider, generating many stem-like files: