My Combo J7 (I think that is the model you mean) mops and cleans by default, with the normal command.
You can send a specific command to do whatever you want. You might need that. You need to work through this thread to clean a specific room: Add support for irobot roomba clean specific room - #25 by jaaem
There is a set of docker commands (early in the thread) or a way to edit the integration (later in the thread) to capture the data to clean a specific room.