Hello Marcotm,
As written in the In-App help:
The Inter-App Audio and Audiobus protocols don’t support automation. However, you can control some of the parameters of your IAA/Audiobus apps using MIDI CC’s provided that the apps you are using support MIDI CC messages.
Please make sure to refer to the In-App help of Cubasis (a simple tap on the help button top right will open it) that includes all relevant information about automation, MIDI CC and other features of Cubasis.
Best regards,
GN