For those in the know, will I be able to export my private keys and data from Passkey somehow, so that if I wanted to, I could switch to another FIDO device or

For those in the know, will I be able to export my private keys and data from Passkey somehow, so that if I wanted to, I could switch to another FIDO device or system? I would speculate Apple is not going to support this, and Apple will retain control of the private keys, and do the request signing like an old-school USB FIDO device, but I don't know for sure.