So the 48mp sensor runs in cropped 12mp while doing some type of exposure bracketing before the user takes a photo, then when the photo is taken the sensor is c

So the 48mp sensor runs in cropped 12mp while doing some type of exposure bracketing before the user takes a photo, then when the photo is taken the sensor is cropped to 24mp. At that point post-processing combines all images together? And shooting at 48mp HEIF does not do this.