If, and that’s a big if, the victim was able to trace the infection back to a charging port, then have the time, resources, and capability to debug the chips.
That’s all assuming the bad port wouldn’t have been removed, and video might just show regular “maintenance.”
Yeah, it’s all above and beyond, but I think it’s in the realm of possibility for a high level target (see: stuxnet et al)
You can buy stamps from a vending machine with cash.