According to Macotakara, the iPhones that Apple will release this year still have a Lightning port. The switch to USB-C is therefore not forthcoming for the time being, although Apple would already conduct tests with iPhones with USB-C.
The Japanese Macotakara reports that Apple will continue to stick to the Lightning connection in 2019. The site released last year that the iPad Pro would switch to USB-C and was right.
Earlier this year, Bloomberg wrote that Apple is testing 2019 iPhones with a USB-C port. It is possible that those devices are there, but Apple does not release them. It is obvious that Apple will at some point make the switch to USB-C, as it did with its iPad Pro.
According to Macotakara, Apple will also supply the 5W charger, which is not suitable for fast charging, with its iPhones this year. Since the iPhone 8, Apple’s phones have been compatible with fast chargers, but users have to purchase a charger other than the one supplied.
2018 iPhones with Lightning Port