I am working on an application that analyzes live video and can tell, with the help of AI, when an object of a certain type (eg, human, vehicle) is detected in the video.
The application will have a wizard for users to start. And it looks like this:
However, the project manager now wants the application to allow subcategories to the Vehicles category, such as Cars, Trucks, Bicycles, Buses, etc. How can I better convey to users that the Vehicles category has subcategories and that they can select one or more of these subcategories?
Simply adding more cards to the list feels bad since hierarchically these are "under" vehicles. I also want to keep all this in "Step 2".
I have been experimenting for 2 days and have tried to flip, expand or transform the card to reveal these options, but nothing "clicked". I am mentally drained of ideas.
General feedback from UI / UX is also welcome.