Is is possible to convey extensions from a subgraph?

We have a gqlgen subgraph running behind the nodejs apollo federated server (@apollo/gateway@2.3.2; @apollo/server@4.4.0). We’d like to offer some semi-structured data for certain queries in the extensions portion of the response. It works fine when we hit the subgraph server directly but apollo is apparently discarding the extensions data.

Is it possible to configure apollo to convey these data? I have reviewed the obvious integration points and haven’t found such an option yet, alas.