Lambda Function not returning all properties in a response via function URL.

I have a Lambda function class in dotnet 8, as shown in the code excerpt below. However, when I deploy this to AWS Lambda and test it via Post Man, I get only the ID of the product, not the name and the description., and I don't understand why given I am returning the entire response object.

public class Function
{
    public CreateProductResponse FunctionHandler(CreateProductRequest input, ILambdaContext context)
    {
        var response = new CreateProductResponse();
        response.Id = Guid.NewGuid().ToString(); // Only Id is returned to the API call.
        response.Name = input.Name;
        response.Description = input.Description;
        return response; // Entire response returned but Name and Description missing.
    }

    public class CreateProductRequest
    {
        public string? Name { get; set; }
        public string? Description { get; set; }
    }

    public class CreateProductResponse
    {
        public string? Id { get; set;}
        public string? Name { get; set;}
        public string? Description { get; set;}

    }
}

Screen shot: