I don't think that they will implement a dual lens array, cause if they do it, then there will be no difference between the iPhone 16. The extra space you see on the case is for LED Flash and not for a secondary lens.
The release of the next iPhone SE is around the corner. Rumoured to be launching with the display from the iPhone 14, the iPhone SE 4 may sport a completely different camera design that gives iPhone 7 Plus vibes, if a new leak is correct.