The modded iPhone 12 Mini demonstrated that both the Lightning and USB-C ports were fully functional, allowing users to charge the device while listening to audio through a wired connection. This is significant because it hasn't been possible to do so since Apple removed the audio jack from iPhones.
It should be noted, however, that adding a USB port to an iPhone is not a new modification. There have been rumors that Apple is considering replacing the Lightning port with USB-C connectivity due to regulatory pressure, but as of now, it has not made the switch.
Author
-Anurag