After our multiple days of testing, it’s clear why Samsung added the additional autofocus sensor.
It not only helps with average shots by ensuring clear views and, in return, artifact-free shots, but it provides less blurry Space Zooms, which is Samsung’s technology for zooming in on a faraway point with optical and digital zoom combined.
https://www.cnn.com/2020/08/18/cnn-underscored/samsung-galaxy-note-20-ultra-review/index.html
Off this auto focus test, the AF does seem to prefer the center of the frame.
https://www.youtube.com/watch?v=jEiVeFTB0JA
That's for the Lidar reference.
