Do we have access to the credit card details (number, expiration date and cvv)?
Apple Pay provides a device-specific account number (it looks like a real card number but not) instead of real customer’s credit card number. The same customer’s card will have different device-specific account numbers on different customer’s devices (iPhone, iPad, iWatch).
The better explanation of Device-specific Account Number you can read here.
Same for expiration date.
CVV does not exist for Apple Pay transactions at all.