Survey-Pdf not supporting new added component

Hi I tried to create my own custom rating "NPS (0-10)" using "rating" question type. It works on survey creator and viewer, but the when I try to export survey as pdf, this new component is not detected and I get blank pdf file. Below the code to that I used to add new component.

Code
Survey.ComponentCollection
        .Instance
        .add({
            name: "nps",
            title: "nps",
            questionJSON: {
                type: "rating",
                rateValues: [
                    {text: "1", value: "1"},
                    {text: "2", value: "2"},
                    {text: "3", value: "3"},
                    {text: "4", value: "4"},
                    {text: "5", value: "5"},
                    {text: "6", value: "6"},
                    {text: "7", value: "7"},
                    {text: "8", value: "8"},
                    {text: "9", value: "9"},
                    {text: "10", value: "10"}
                ]
            },
            onInit() {

                Survey
                    .Serializer
                    .addClass("rateValues", [
                        {name: "value:number"}, {name: "text"}
                    ],
                    function () {
                        return new Survey.ItemValue(null, null, "rateValues");
                    }, "itemvalue");

                Survey
                    .Serializer
                    .addProperty("nps", {
                        name: "rateValues:rateValues[]",
                        category: "rateValues"
                    });
            }
        });

To give exact example, my nps question (new component) doesn't list on console when I write this code while generating pdf.

Code
var surveyPDF = new SurveyPDF.SurveyPDF(this.json, options);
surveyPDF.data = surveyModel.data;

surveyPDF.getAllQuestions().forEach((q: any) => {
    console.log(q.name);
    });