I wondered the same thing – found this:
There’s a bit of setup needed but it’s worth it:
In Live’s midi prefs, make sure Digitakt midi out is enabled (using DT’s midi over usb).
Add 9 midi tracks to a new Live project. Add the ‘Brain’ device to the first track, followed by the 8 ‘Satellite’ midi receiver-sender devices which will send the midi to the DT. Add the Satellite 1 device to track 2, Satellite 2 device to track 3, etc.
Basically, the Brain device receives your notes (played in via your e.g. midi keyboard) and sents them out round-robin style to the satellite devices, one note per track. These notes now need to be sent out to your DT – so set each of the 8 track’s midi out choosers to Digitakt and set their channels consecutively, 1 to 8. You can then group the 9 tracks and save this group track as a template in Live’s browser, ready to be dragged into any set when needed.