Apple DOES NOT give Face ID data to third-party developers (or even to themselves). They don't do this, because they can't.
Face ID data is stored encrypted in the Secure Enclave (hardware that is not accessible by any application). In fact, NO Face ID user data is even required by third-party developers to produce apps that use facial recognition.
It is impossible to "steal" Face ID data. Third party developers have always been able to, with the users' permission, use the front facing camera (even BEFORE there was ever a Face ID system). Whatever gets used by those apps is NOT the same type of data as the securely stored Face ID data, and therefore CANNOT be used to "break" any security that relies on Face ID.
A developer may have a 3D scan of your face, just as developers previously could get a photo or video of your face. But that 3D scan in a third-party app, can't be used to override anything that Face ID does.