Reliable source Unknownz21 revealed in the latest tweet that Apple began testing iPhone 15 models with Lightning ports in January 2022, but the prototype was quickly abandoned by Apple.
The content of the tweet translated is as follows:
Some details about the USB-C port on the iPhone 15 models:
Apple began testing the Lightning port in January 2022, but in March 2022, the focus of development shifted to the USB-C port.
The Lightning port did exist in the early days of the iPhone 15 series prototype development, but it was quickly abandoned by Apple.
Apple has been integrating USB-C ports into its Mac product line since 2015, and into its iPad product line since 2018. All iPads currently sold by Apple are equipped with USB-C ports, and currently only iPhones still use the Lightning port. Apple is planning to transition to USB-C for iPhones due to European regulations requiring universal chargers for electronic devices.