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> Apple has the key derivation function and presumably everything used to generate your key.

Nope.

The Secure Enclave still contains things like UID and GID which are fused into hardware at manufacturing and are not externally accessible, not even through debugging interfaces such as JTAG.

So Apple will never have all the input parameters for the key derivation functions.

And please, lets not go into tin-foil hat territory where you somehow think Apple logs all keys ever fused during manufacturing and then somehow ties these to you personally.