Apple doesn't sync secure enclave information to iCloud. Also, not all iCloud synced information can be accessed. iCloud Keychain, for example, can not be decrypted by Apple.
In 1Password 7 for Mac we generate a key pair in the secure enclave. Then use that key pair to encrypt the Master Password and then save it to the Apple Keychain. All decryption of the Master Password goes through the Secure Enclave.
The key pair is generated in, and never leaves, the Secure Enclave. It's how this feature was designed by Apple.
Can Apple then get my Master Password (along with FBI w/warrant, etc)?