No, it was actually shot on Panavision lenses with iPhones attached. Big difference.
If yes, than you are correct to point out the difference. If no, than the way it was phrased was not that wrong, after all. Using the iPhone did make a difference.
The main difference is nobody's running massive marketing campaigns for "Shot on Huawei" or "Shot on Pixel"
The lenses are the most relevant part of a camera. Outside of that, the next most relevant part of the iPhone camera is software. (And I'm sure there's post-processing on that video too.)
We say movies are "shot on iMax" or "shot in 70mm" not "shot on Carl Zeiss."