I just tried the same setup for the midi channels instead of audio channels, sending midi ccs from DT to Typhon, and it works exactly the same. Midi scenes are also possible. The ccs changed just like the parameters of the audio tracks! I haven’t tested it deeply so I don’t know if there are limits, but it does work!
EDIT: Midi tracks and audio tracks share the same trigs so when you hold them down, they will activate the corresponding audio track scenes as well. This works the same way when an audio track is selected. It will trigger the midi scenes. They’re all part of the same scene. And since the Digitakt has 8 midi tracks, then 8 pages of midi assigned midi cc messages can all be included in a scene that controls the parameters of external gear. My Typhon now has scenes. And the 72 plock limit doesn’t seem to have any effect for midi tracks either, despite the “p lock memory full” message on the screen. Just ignore it and keep creating scenes.