A new leak suggests that a Thunderbolt cable could be sold as an add-on for the upcoming iPhone 15 Pro.
On X social media, @KosutamiSan claims that Apple will sell a 0.8-meter cable as an optional accessory for the iPhone 15 Pro. The USB 4 Gen 2 accessory can produce 150W and is different from the existing Thunderbolt cable lineup. The leaker said that the cable would act as a data transfer cable, which means the included cable for the phone might be just for charging purposes.

Data transferring cable for iPhone 15 Pro- which sold separately. Up to 120W Charge, features USB4 Gen2. Length 0.8m.(Different than existing thunderbolt one)
— Kosutami (@KosutamiSan) August 25, 2023
(Already got this since feb)(DVT Sample)#Apple #appleinternal pic.twitter.com/M5genGQ2NK
An earlier rumor suggested that the iPhone 15 Pro will have a USB cable for charging, which has always been the staple. The move is a marketing ploy for consumers who will have to purchase an accessory for data transfers. The leaker surfaced with a lot of claims recently, including DVTs, or manufacturing test products.
The iPhone 15 Pro is expected to launch this fall.