Can we use rover to create API schema ( without federation content ) from supergraph which is not in registry but it is in local?
I don’t believe so, Rover can create the supergraph schema via rover supergraph compose, but the router is what produces the API schema.
You could do rover dev to start the router for you, then introspect via rover graph introspect as a workaround.
What’s your use-case for this behavior? Maybe that’s a feature we should add to Rover?