Answer:
Reg E 1005.11(a) defines what is considered an EFT error. The transaction was not unauthorized, nor was it incorrect as the customer was charged the correct amount. Non-receipt of goods is not on the list of errors in 1005.11(a). Sending money via P2P to purchase something online is no different than handing a stranger cash. There are no protections in this case as you can't file a chargeback against Apple Cash. The customer received the service they paid Apple Cash for. Apple Cash sent money to the very fraudsters the customer asked it to.
This is a case of buyer beware and never send P2P payments to purchase anything online.