SecKeyGeneratePair on iOS 18 returning missing SecKeyRef

A call to the API SecKeyGeneratePair in SecureEnclave for iOS18 returns an OSStatus 0 but the SecKeyRef is not present.

Understand that this API is currently deprecated and there are plans to move to the new APIs, but I believe this API should still work in iOS18 as expected for now.

The API works as expected on iPadOS 18.

// Create SE key
let sacRef = SecAccessControlCreateWithFlags(kCFAllocatorDefault,
                                             kSecAttrAccessibleAfterFirstUnlock,
                                             .privateKeyUsage, nil)!
let privKeyAttr = [
    kSecAttrAccessControl: sacRef,
    kSecAttrIsPermanent: true,
] as NSDictionary
os_log("Priv key params: %{public}@", log: osLogger, privKeyAttr)

let keygenAttr = [
    kSecAttrApplicationLabel: attrApplicationLabelSeKey,
    kSecAttrTokenID: kSecAttrTokenIDSecureEnclave,
    kSecPrivateKeyAttrs: privKeyAttr,
    kSecAttrKeyType: kSecAttrKeyTypeEC,
    kSecAttrKeySizeInBits: 256
] as NSDictionary

var error: Unmanaged<CFError>?
os_log("keygen params: %{public}@", log: osLogger, keygenAttr)

var keyRef: SecKey?
let status = SecKeyGeneratePair(keygenAttr,
                              &keyRef,
                              nil)
os_log("SecKeyGeneratePair osStatus: %{public}d, keyRef: %{public}@", log: osLogger, status, keyRef == nil ? "null" : "ref present")