I would venture to guess all the US web site in the Apple world are well aware of the issue. Ask Ben Lovejoy at 9to5mac there is a distinct reason why they haven't picked it up.... after 60 days of sales in the millions and their own testing shows no issue to speak of unless your at 100% pixel for pixel which is what we do with Nikon D4/5 and same with Canon's those are full frame bodies with corresponding good pro line sense in the low $2,000 and up.
Apple never developed this to be used for pixel peeping. And many groups on Flickr and elsewhere have very nice prints at letter size and below which is more in line with expectations for a camera phone. I don't care how many pixels you cram on the chip only so much you can do.
Now its a shame many here aren't happy with their iPhone 7's as so many shots taken and tested ahead of release along with known fact since version 6 that Apple bumped up the noise reduction a bit too much. That is what their engineers came up with I disagree with them on that along with over sharpening of the jpegs.
Either way just my opinion and I hope you all find a resolution to this. I have googled using many search terms about bad pictures on iPhones etc and only get this thread.....
On another note 2 days back this thread was up to 20 plus pages so 4 disappeared.