It would depend on how each app is coded, and the size of your hands. For example, in Facebook, you can swipe from anywhere on the screen, whereas in Safari, you face to swipe from the very edge of the screen.
Yes, but swiping from the middle is not... hence my post. OP mentioned Instagram, which is owned by Facebook, and both of those apps do not require a swipe from the edge. You can swipe from anywhere. Naturally, for people with smaller hands, these apps are easier to navigate one-handed on a Max.Swiping from the edge is a system wide OS feature.