Great question, the approach really depends on the artistic context you’re working in.
There’s actually a small but lively corner of composers using sclang for contemporary instrumental work, often seasoning their pieces with a bit of generative magic. This topic has floated around the community before, for instance here:
If you’re not married to real-time notation on the fly, the pragmatic route is just routing your event streams into a DAW such as Reaper, export the clips as MIDI files, and hand it off to a notation tool like Sibelius to clean things up into something performers can read without raising an eyebrow. If, however, you do want to watch your midi events to crystallize into staff notation on the fly, then a solid option is pairing Max/MSP with the bach library, which is built for score-based output.
If you’re curious, here’s one of my more recent generative instrumental pieces driven largely by sclang’s pattern library doing the heavy lifting behind the scenes.