Add extra Button beside Submit in Submit New request page

If smbd will need. It refers to premium checkbox and copies Submit button function.

document.addEventListener('DOMContentLoaded', function() {
  var contactForm = document.querySelector('.form footer'); 
  
  // Creating "Premium Submit"
  var premiumButton = document.createElement('button');
  premiumButton.innerText = '⭐ Premium Support ⭐';
  premiumButton.setAttribute('value', 'Submit');
  premiumButton.classList.add('premium-button');
  premiumButton.addEventListener('click', function() {
    // Activation of premium as "Premium Submit"
    var customField = document.querySelector('.request_custom_fields_16473255335185 input[type="checkbox"]');
    if (customField) {
      customField.checked = true;
    }
    
    // Send as submit
    contactForm.submit();
  });
  
  
  contactForm.appendChild(premiumButton);
});