iPhone XS has a completely new camera. It’s not just a different sensor, but an entirely new approach to photography that is new to iOS. Since it leans so heavily on merging exposures and computational photography, images may look quite different from those you’ve taken in similar conditions on older iPhones.
The developers of the Halide app for iOS – a photo app that notably shoots in raw – explain how the iPhones XS camera is so different from its predecessors. He goes into great detail, and it’s worth reading this if you’re a bit of a photography geek and want to know how to manage this new device.