Microsoft's Edge on Android smartphones and Apple iPhones is merely a thin cover over native open-source web browsers.
Under the surface of the new Edge iPhone lies the open-source WebKit. This is Apple's Safari default web engine. On iOS, Microsoft had no choice but to use WebKit. Apple insists all iPhone web browsers are built on top of it.
The Android Edge app, meanwhile. use the Google's open-source Chromium Blink engine. Microsoft isn't trying to port its Microsoft EdgeHTML rendering engine to either platform