Once every object in the frame is mapped to 3D coordinates, exaggerating the parallax is trivial (like rendering a video game for 3D glasses / VR), but to your point, figuring out what was behind those objects (to fill in the negative space that remains after translation) is a guessing game, equivalent to various smart fill / magic eraser features. Originally they used only context from the same photo, and nowadays they also use generative AI. Not always great results.

Keep in mind it also has a LiDAR sensor building a point cloud at the same time.

There are some small predators with excellent binocular vision who would like a word with you.

Phones are longer than 6.3cm, so put the other camera on the other end, with the added benefit of encouraging landscape-oriented images as well.