Leaked schematics and CADs of the forthcoming iPhone 13 have revealed a larger rear camera array. This contradicts at least one recent report, but would align the expected camera improvements expected come with Apple's next-generation iPhone.
https://www.notebookcheck.net/Purported-iPhone-13-schematic-and-CAD-leaks-point-to-larger-rear-camera-array-on-all-models.532918.0.html