Apple is currently rumored to wait until 2023 to launch its first-ever mobile device with a folding display. A new report from the South Korean media backs this timeline up. It also purports to drop further details about the development of this kind of iPhone - or, possibly, iPhones.
https://www.notebookcheck.net/Another-leak-points-to-a-2023-launch-for-the-first-gen-Apple-foldable.562626.0.html