Angular, Not able to change Referer Header

I am accessing a third party service through the HttpClient of Angular.
Before writing the code I made some test with Postman , if could access this third party service. And I notice that i have to set Referer to name of domain of the third pary in order to get a successful response from the third party. So in order to get a successful response I should tell the third party that this request is originating from a specific url.

The problem is that i cannot set the Referer header from angular. Is it possible to set the Referer Header from angular? How can i achieve to modify the Referer Header? I have simplified the code by removing the business logic. Below is what i am trying to do to achieve this.

    var serviceUrl = "https://xxx.yyy.zzz";
    let httpOptions = {
      headers: new HttpHeaders({
        'Referer': 'https://xx.yyy.xx'
      })
    };
    let formData = new FormData();
    formData.append("x","z");
    formData.append("y","z");


    this.httpClient.post(serviceUrl,formData,httpOptions).subscribe(response => {
      console.log(response);
    });