shipping classes and custom shipping

hello, I have your pro version and its pretty cool, however I was wondering (perhaps I just don’t see it) but I was wondering why you don’t have the option to create custom shipping and then in the settings of that custom shipping method use shipping classes to define when that shipping method is used. So if I have a method called “this shipping method” and want it to only apply if a product with “this shipping class” is in the cart, then I can select that as an option. That is how WooCommerce is standard so it would make sense. Currently, I only see min and max weight. Is there a way to do this?