Analyst Ming-Chi Kuo thinks we will not see iPhone under-display cameras sooner than 2024, as Apple is still working to improve low-light image quality through AI algorithms and more powerful image processors. The 2023 iPhone 15 models could, however, offer a full-view screen by integrating the front camera system in the upper bezel.
https://www.notebookcheck.net/2024-iPhones-likely-to-get-full-view-screens-with-under-display-camera-and-Face-ID.614664.0.html