Debit Card Transactions Covered by Reg E

We have received debit card disputes from multiple customers that believed they were making arrangements to purchase a pet from someone that posted an ad on Facebook. In each case, the customer selected a pet from a photo they received from the "seller" and then sent money as instructed via PayPal, Zelle, Western Union, etc. All transactions were initiated with debit card information. After payment was sent, each customer realized/decided that they are most likely the victim of a scam, and no pet will be received. Are these transactions fully covered by Reg E? I'm struggling to come to a conclusion, because at least one customer is unable to provide documentation that indicates when the pet is expected to be received. In all cases, the customers willingly provided their card information and sent money to someone they do not know.