Unable to determine the limitations of sharing an enclave's quote or PCK certificate with reliant third parties.
The Intel® Software Guard Extensions (Intel® SGX) enclave's quote contains the PCK Certificate, and there are no limits on sharing the quote with reliant third parties.
After you send the quote to the remote relying party, the third party's quote verification libraries can use it by pulling the rest of the required quote verification evidence and collateral directly from Intel® Software Guard Extensions Provisioning Certification Service (Intel® SGX Provisioning Certification Service). The latest version of the QCNL allows you to do this.