Why YSK: I’ve been seeing an increasing number of phone photos shared online in 9:16, 9:21 or similarly tall aspect ratios, often with parts of the subject cut off. I’ve asked a few people why they cropped their images that way, and none of them knew they were cropped.
Here is one for iPhones :
https://www.dpreview.com/articles/6780391159/all-apple-iphone-13-and-13-pro-camera-upgrades-explained