ios requires multiple swipes as the page just moves a fixed distance regardless of how much force you use.
I can not believe that no one ever talks about this feature. Its one of those gems on android.
Because this characteristic of iOS is an antiquity of when Apple needed to artificially slow the scrolling of the webpage in order to allow the webpage to render smoothly. It was one of the tricks used in order to maintain UI fluidity.
The current hardware is past the point where that is required but they have still maintained this.