How can I change the OpenAPI operation definition?

[paulomorgado]

If I define the OpenAPI operation using OpenApiRouteHandlerBuilderExtensionsProduces and want to add a description to the media type, using OpenApiEndpointConventionBuilderExtensions.WithOpenApi from Microsoft.AspNetCore.OpenApi, that change is not reflected in the resulting Swagger/OpenAPI document generated by NSwag.

But if I completely define the OpenAPI operation using using OpenApiEndpointConventionBuilderExtensions.WithOpenApi from Microsoft.AspNetCore.OpenApi everything is in the resulting Swagger/OpenAPI document generated by NSwag.