@leocg @leocg my dear friend you say in android , story of android is completely different from ios , another freind has answered you in this post :
“ Apple requires all browsers on IOS use Apple's Webkit rendering engine (the one Safari uses) so any supported formats should be the same on all IOS browsers. On other platforms, Opera would be based on Blink (Google's rendering engine) and thus support the same formats Chrome does. Including webp. “