Attach generated PDF file (blob) in phpmailer?

Question

PHP

Good afternoon!
Using the library for creating a pdf document, I create the pdf itself.

const worker = html2pdf();
worker
      .set(opt)
      .from(text, "string")
      .output("blob")
      .then(pdf => {
        const formData = new FormData();
        formData.append("php", pdf);
        // console.log(pdf);

        var xhr = new XMLHttpRequest();
        xhr.open("POST", "mailer.php");
        xhr.send(formData);
      });

The output is a blob.

You need to attach it to the letter and send it.
Here is the letter code:

use PHPMailer\PHPMailer\PHPMailer;
  use PHPMailer\PHPMailer\Exception;

  require 'lib/src/Exception.php';
  require 'lib/src/PHPMailer.php';
  require 'lib/src/SMTP.php';

  $email = new PHPMailer();
  $email->CharSet = 'UTF-8';
  $email->SetFrom('[email protected]', 'Test'); //Name is optional
  $email->Subject   = 'Договор';
  $email->Body = 'Тестируем отправку почты';
  $email->AddAddress( '[email protected]' );

  return $email->Send();

Can you please tell me how it can be done in this case?