Reputedly, Apple will hold off on equipping iPhones with periscope cameras until next year, starting with the iPhone 15 Pro and iPhone 15 Pro Max. However, Apple is tipped to opt for five-fold optical zoom, rather than matching Samsung with its ten-fold optical zoom camera in the Galaxy S21 Ultra.
https://www.notebookcheck.net/Apple-iPhone-15-Pro-and-iPhone-15-Pro-Max-to-launch-with-periscope-zoom-cameras.594652.0.html