Cyclists may have better experiences when they ride bigger in the lane when on narrow roads, such as you describe.

Riding big communicates clearly to drivers behind that if they want to pass, they must move into the other lane.

Sometimes drivers aren't sure about passing — is there room to share the lane? They may not figure it out until they are already committed.

Better to tell them, with your lane position, that there's no room for two — move over to pass.

When I use lane position to signal tight conditions, drivers are much better at passing me. They pass as they would a car.