It dominates the rest of the world due to cheap android phones being available there and many of them can’t buy Apple phones for cheap.
For example: India , where I come from, people can’t afford iPhones so they buy the cheaper android phones. But literally every single person buys an iPhone as soon as they can afford it. iPhone market was really low in the past because you couldn’t even buy it there. Now that the used iPhone market is growing there, a lot of people prefer buying a used , relatively cheap and reliable iPhone over a new cheaper android phone.
Market penetration is the issue. Not that people over there love android over iPhones.
Everyone there loves iPhones over android.
Is it though? My iPhone 13 Pro battery is still at 89%