Can I send money using American Express card
Can I use American Express card to send cash
iPhone 11, iOS 15
Question marked as
No.
See the following from Send and receive money with Apple Cash - Apple Support
When you send money using Apple Cash, your Apple Cash balance is used to pay by default. If you want to use a debit card in Wallet instead, you can send money directly from your debit card.
and the following from Add money to Apple Cash - Apple Support
You can't use credit cards with Apple Cash, and you might not be able to use some prepaid cards.