Does anything about ePub prevent renderers from putting footnotes at the bottom of the physical page to which they logically belong? I find navigating them by

Does anything about ePub prevent renderers from putting footnotes at the bottom of the physical page to which they logically belong? I find navigating them by touch in their usual placement so cumbersome (requiring tapping on tiny targets, which is usually registered as a page flip since it's in a margin) that I wonder why no alternatives have been explored.