Sounds like a new vulnerability route if you can flash the device without access to a port. I’d imagine it’s also in preparation for the removal of the port.
Apple Watch since Series 7 has had a 60GHz wireless USB transmitter in it that replaced the hidden pogo-pins used for OS recovery and diagnostics in the back of house at Apple Stores. They designed a specific sled that has an Apple Watch charger and the 60GHz macguffins, and then carriers that each model watch rides in on top to align to the charger and the 60Ghz connection.
Wireless USB at ~60GHz has (sort of) been a thing for a while for short range comms as a possibility.
One of the largest devices that ever used it was the Essential PH-1 and its snap-on camera module (and some other modules as well); the data was transferred over 60GHz USB while power and alignment was delivered by two pogo pins.
I have been saying for years the next move for Apple is to ditch the charge port entirely. It makes the phone significantly more secure as well since Cellebrite, elcomsoft, etc rely on the lighting port /usb-c for mobile forensics work.