Your failure to research the feelings behind this statement is obvious. Fingerprints on an iOS device are stored in the Secure Enclave, a hardware module on the device itself, used for checking fingerprints, answering yes or no to the question "is this the user's fingerprint?"

As for Apple Pay, your card details are used once -- exactly once -- to generate an obfuscated alias card identifier, again, only useable by the device.

There is no database. Fingerprint data doesn't leave the phone. No one stores your credit card details.

https://www.apple.com/business/docs/iOS_Security_Guide.pdf

Research before writing.