I picked up a pair of AirPods Pro a bit ago, and was surprised to see a Lightning connector. Not only that, but the included cable was USB-C to Lightning.
Because most of the people who buy the airpods, have an iphone.
So, they can use the cable they use to charge their iphone to charge their airpods and vc versa.
The fact that it's an usb-c to lightning is because all their macbooks are usb-c ;-P
I don’t know why they bothered at all, honestly.