Hey team, I am trying to implement BDC in my repo but my provider only has a graphQL document, not an Open API spec. Is there any way for me to use this document for BDC?

No, its an open feature request https://github.com/pactflow/roadmap/issues/53 supported contracts are listed on the doc site https://docs.pactflow.io/docs/bi-directional-contract-testing/contracts/oas