The Samsung Galaxy S11 series is currently believed to have as much as 4 rear cameras in a rectangular module. Some renders associated with the highest-end Plus variant suggested that the lenses were placed in there in a less than appealing pattern. However, OnLeaks has updated these rumors with a new prospective Galaxy S11+ image.
https://www.notebookcheck.net/Samsung-Galaxy-S11-latest-leak-shows-new-cleaner-rear-camera-array.448885.0.html
Strange way to make a periscope, the front element/cover glass is neither round nor rectangular.