It's not the original. It's a 2048×935 @ 72ppi, at a guess about 1/4 the actual size shot and it's been compressed so it can be uploaded onto a website. It's hardly a real representation of the capabilities of the camera.
Yeah, I expected a bit more of a hardcore review. Maybe we'll have to wait until a dedicated photography blog reviews it. For what it's worth, there's this review here that compares its video capabilities to a Sony a7S III, although the reviewer seems unfamiliar with HDR workflows: https://petapixel.com/2020/10/26/sony-a7s-iii-vs-the-iphone-...