The Secure Enclave is just a part of the T2 chip. My understanding is that this is similar to if you jailbreak your iOS device, you won't get any special access to the Secure Enclave.
And as I understand it, it's also the Secure Enclave that enforces the attempt limits.
That’s right, but the T2 chip is based on the A10 one and has the same Secure Enclave; this enclave is vulnerable to the blackbird exploit discovered recently.
And as I understand it, it's also the Secure Enclave that enforces the attempt limits.