https://wccftech.com/pixel-6-pro-different-design-because-sensors-are-too-big/

You do not need to have an eagle eye to see that the images Google posted of the Pixel 6 and Pixel 6 Pro are of a design that has never been used by the company. It turns out, there is a good reason for it, with Google’s executive saying that the rear camera sensors were too large.

Rick Osterloh, Google’s Senior Vice President of devices and services, provided the following details on why the Pixel 6 and Pixel 6 Pro look the way they are.