Trying to implement a 'pull up to add' .. having issues with List.updating and List.onChange

I'm trying to implement a 'pull up to add' to a list. Kinda like 'pull down to refresh'.


I have added a DragGesture to the List. But I only get a single callback to 'onChange()' and I cannot figure out how to implement 'updating()'


Anyone have any success in using 'updating()' to track a scroll view position/state?