Chord suggestions for a given chord

Hello everybody
I have lost a bit of contact with the new versions.

  1. is there a manual for 2.3?
  2. is a ScalerControl2 planned for Cubase11 and when.
    but the most important! (How should I describe it?)
  3. what I am looking for is a scaling & chord suggestions to a given chord (no matter on which step). e.g. what fits to Cm 6/9, which scales at which step?

many greetings