In contrast, when all of us who despite ORMs are using that term, we are talking about a library or--worse--a framework designed to have the developer directly make queries using object-oriented data modeling. These layers then generate SQL that is pretty much guaranteed to be not just inefficient but ridiculously unscalable in ways that you run into even in simple software.
It sounds like in your architecture you would have no use for what I would call an ORM: at best, maybe the application developer that is consuming your API would in turn (I would argue, incorrectly) choose to use an ORM to access your GraphQL... but they are not generating SQL and you are not making queries. So I guess I just feel like you and we are talking about entirely unrelated use cases?