One way to test if your command has created a comprehensive project is clicking the 'Get More Accuracy' button in the UI. In Comprehensive projects the button will directs you to configure modelling settings, if it didn't run comprehensive you will see new models being made.
By default R projects modelling mode is FullAuto, defined in the docs as "represents running the entire autopilot". I'm not sure if that means comprehensive or not.
The Python API has 'COMPREHENSIVE' has a modelling mode. The R API is not as straight forward as it doesn't list comprehensive as a mode.