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.
It seems dangerous to have the scanner on the device and I don't trust it to be safe. It's the print I'm concerned with not the hashes and crypto that connect you to payment. This is something enticing to authorities and I'm sure they'll want to figure out how to get it.
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.