This is because iPhone photos are ubiquitous which causes photos from less common phones to stand out. And the less common phones likely optimize for this A/B test scenario by e.g. increasing contrast and saturation. Meanwhile Apple likely has little to no interest in optimizing for A/B tests with minor smartphone players, and instead optimizes merely for delivering satisfying photos in the widest range of scenarios.

Pixel photos are very good too, for the record. I just think the "blind camera test" is worthless.

For pictures but not for video, the stabilisation is better on iOS typically

This is tricky. Most Android phones apply heavy color saturation and contrast adjustments, by default, to the images and the display itself, where iPhone tends to keep things more "raw". But, "pop" is what the average person usually prefers. It's post processing step that can heavily influence favor, unrelated to the camera. The Samsung cameras are still objectively better though, in many metrics.

My work involves showing images accurately on screens, and I always have dig through all the settings to make the Android phones just to show an image without heavy modification (for Samsung, it's 3 separate settings!). There is no such setting for iPhone, where the default experience is a (literally) color calibrated screen.

In my view Pixels have been dominating in still photos for years but their video has never been on par with iPhone. I'd put my old Pixel 3's still camera up against my iPhone 13 any day (if my Pixel hadn't bricked itself a little out of warranty like all of mine seemed to).

The difference between the photos on any flagship phone for the past 5 or so years is insignificant and mostly up to personal preference, but the difference between iPhone and anything else in videos is massive.

What if I personally don't tend to agree with most people over what constitutes a good looking photo?