Cubase 12 (Nuendo) Overbridge Audio In

Hello,
I’m having some difficulty setting up the audio inputs within Nuendo. It only gives me 3 stereo inputs in the DAW options, but in the Rytm plugin there are 8. I have had this working in both Reaper and Ableton, as well as Protools Via rewire and Blue Cat Audio.
Anyone else using this functionality within Cubase or Nuendo here that may be able to shed some light?
Thanks!