It would be free on all plans provided you don't add syns to make it.
Also just to add that not all canned soups are a HEB, infact hardly any of what are available are allowed as a healthy extra, and even then it's often only half a tin. Much better and tastier to make your own!
Soup made from free foods is great.You can just throw in what you have leftover.Today i made a simple soup of cauliflower,carrot and celery with a chicken stock cube,wizzed it up and voila!