As per the source: I got a 3D print mock from Alibaba Sources, which is said to be an iPhone 2021 6.1-inch model, and compared it with the current iPhone 12 Pro.
Image: Macotakara
Regarding the size of the active area of the sensor housing, the height becomes from 5.30mm to 5.35mm and the width becomes from 34.83mm to 26.80mm.
The position of the speaker/microphone of the iPhone 13 series is closer to the housing side like Xperia PRO, Xperia 5, and so on.
The infrared camera and floodlight illuminator, which was located on the left side of the speaker / microphone, seems to move to the place where the speaker / microphone of the iPhone 12 Pro was.
The front camera seems to be changed from being placed on the right side of the speaker / microphone to the left side.
The position and size around the rear camera do not seem to be different from the iPhone 12 Pro.
Via: Macotakara