I’ve never seen swiping from up to down being called swiping up, it’s the website that moves up, not the swipe action. If one sees a swipe action associated with the arrow pointing down, like here: https://i.imgur.com/Rvbvh8o.jpeg , then the vast majority are going to attempt swiping down, according to the direction of the arrow. Well, unless they read the entire instructions beforehand, which, as you can probably guess, does not always happen in the real world 🙂