A ToF sensor counts the amount of time it takes for a reflected beam of light to bounce back to a sensor and this helps with 3D mapping for portrait images and facial recognition.
An insider privy to the matter has said that consumer response to camera arrays without a ToF unit has not been bad and thus the company has decided to not equip the Galaxy S22 with it.
Samsung seemingly thinks its flagship phones don’t need a ToF unit because it doesn’t serve a meaningful purpose at the moment. It might return when augmented reality (AR) and virtual reality (VR) apps take off.
Beyond the omission of the ToF camera, almost nothing is known about the Galaxy S22 series. It will likely be unveiled in the first quarter of 2022.