I wish I had an answer, I’m having the same problem. Additionally, my DAW (Ableton Live 10.1.9) isn’t picking up the digitaikt as an Audio Interface/Soundcard. I don’t think many people use it for this, but for diagnosis purposes, maybe see if your Mac will bring it up in Audio/Midi setup or in SystemPreferences/Sound as an audio driver. Good luck!
But be aware that Overbridge 2 requires you to upgrade the firmware of all your other Elektron machines (if you have one?) to a matching version, too.
In general it’s an either/or situation: either upgrade to Overbridge 2 (which is still in BETA and may not be completely stable or even may be incompatible with your computer OS) or stay at Overbridge 1 and forget about Digitakt integration.
I’m not completely sure, but I think you cannot have both versions on your computer.
(your post made not clear if you have any other Elektron machine or if you are already using Overbridge 1)