<div class="field iti__phone">
  <label for="contact_request_resend_phone" class="field__label">Telefon*:</label>
  <input type="tel" required name="phone" id="contact_request_resend_phone" class="input"
         data-contact-request-target="phoneInput" data-action="change->contact-request#validatePhone">
  <small class="invalid-feedback hidden" data-contact-request-target="invalidPhone">Telefon ist falsch</small>
</div>
<div>
<button type="submit" class="btn btn_try" data-contact-request-target="submitBtn">Erneut senden</button>
</div>