Is Apple Pay Safe?
When you make a purchase, Apple Pay uses a device-specific number and unique transaction code. So, your card number is never stored on your device or on Apple servers, and when you pay, your card numbers are never shared by Apple with merchants.
When you pay with a debit or credit card, Apple Pay doesn’t keep transaction information that can be tied back to you. And when you use Apple Cash, information is stored only for troubleshooting, fraud prevention, and regulatory purposes.
Learn more about Apple Pay https://www.apple.com/apple-pay/