It turns out that the Pixel 6 Pro shares even more with recent Samsung flagships than previously thought. While we already know that the device uses a Samsung ISOCELL GN1 sensor as its main camera, it also relies on the 48 MP telephoto camera from the Galaxy S20 Ultra.
https://www.notebookcheck.net/The-Google-Pixel-6-Pro-and-Samsung-Galaxy-S20-Ultra-share-the-same-telephoto-camera.575235.0.html