Why can't I see the 'View submitted data' button after sending the public link on the confirmation page?

This button is only available on the confirmation page after the public link creation phase when the OTP option is disabled. If you need users to be able to see the submitted data again, you can send them the read link by mail, using the operation "Create a public link for a document protected by an OTP".

If you have created a new template, you should control the appearance of the button:

{% block confirm_subtitle %}
      {% if has_otp %}
         <p>{% trans "I want to see what information I have sent" %}</p>
      {% endif %}
{% endblock confirm_subtitle %}
{% block confirm_link %}
      {% if has_otp %}
             <a href="{{ edit_url }}" class="btn btn-primary text-uppercase" role="button">{% trans "View submitted data" %}</a>
      {% endif %}
{% endblock confirm_link %}

The {% if has otp%} tag controls that the button is displayed only in cases where there is OTP information about the user who should access the document. Without this control, users will see the button, but will not be able to access the information sent.