I don’t understand. Is this an experimental feature? How do you do this?

One issue with shooting uncropped is that the composition will most likely take advantage of the aspect ratio you are using and not necessarily crop well. Composing the shot in the aspect ratio that you intend to display it is actually a better technique unless you are very skilled and able to imagine how you’re going to crop it in the future.

I did some testing on my phone, Samsung S22, and it looks like 1:1 uses the most of the sensor. Any other aspect ratio was zooming in. This is particularly upsetting to me since I was using the “full” setting which cropped the most but I thought I was using the most of the sensor.