From watching BoTW speedruns (which, I assume is the same engine), the game simply does not do loading screens in the overworld. If you move to quickly, you get

From watching BoTW speedruns (which, I assume is the same engine), the game simply does not do loading screens in the overworld. If you move to quickly, you get to experience an area that is not fully loaded. Having said that, looking at what it takes for speedrunners to accomplish that, you will likely never see even that in casual gameplay.