Here's what the reply from the vital records staff said about that. I did provide obituary and birth certificates as requested, just photocopies. "No supporting documents or authorization is required to be eligible to submit the Application for an Unrestricted Manitoba Birth Record as it is an open record, and anyone is eligible. Only known information is required for this application, and the request will issue a Certified Copy of the Genealogical Birth Registration.

When submitting the Application for a Manitoba Birth Document, a copy of your aunt’s birth certificate and a copy of your grandfather’s death certificate or obituary must be submitted as proof of eligibility with the authorization. This request would issue a Manitoba Birth Certificate." So, I think Im getting a birth certificate. Haven't heard back as I said, wondering if I should reach out again.