I've created

spec:
  oidc:
    issuerType: keycloak
  openapiRef:
    url: >-
      https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/examples/v3.0/petstore.yaml
 prefixMatching: true

and oidc section with issuerType which is only one required doesn't propagate to Product CR, see https://github.com/3scale/3scale-operator/blob/master/doc/product-reference.md#oidcspec

and of course it doesn't set proper Authentication setting in Product object in 3scale.

Edit: If I use OAS with OIDC section it propagates https://raw.githubusercontent.com/3scale-qe/3scale-tests/main/testsuite/resources/oas3/petstore-expanded.yaml
But in the first case there is no error message, so user doesn't know where to find a problem.