Why is this STATUS API not working?

I'm trying to use the STATUS_API in my application, but it simply doesn't work. Am I doing it wrong or there anything more to it?

adobeDCView.registerCallback(
    AdobeDC.View.Enum.CallbackType.STATUS_API,
    function (metaData) {
        /* Resolve or reject response in given format */
        /* Status callback success case */
        return new Promise((resolve, reject) => {
            resolve({
                code: AdobeDC.View.Enum.ApiResponseCode.SUCCESS,
            });
        });

        /* Status callback file modified case */
        return new Promise((resolve, reject) => {
            resolve({
                code: AdobeDC.View.Enum.ApiResponseCode.FILE_MODIFIED,
                data: {
                    modifiedBy: {
                        name: "iiii",
                        mail: "mail@mail.com",
                    }
                }
            });
        });
    },
    {
        filePollFrequency: 10,
        keepPolling: true,
    }
);

Even after making changes, there is no update on front end, no error on console either