odoo-survey-addons/survey_pass_fail_messages/views/survey_templates.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
  <data>

    <template id="survey_fill_form_done" name="Survey: finished score" inherit_id="survey.survey_fill_form_done">
      <xpath expr="//t[@t-if='answer.scoring_success']/div[1]" position="after">
        <div t-field="survey.description_done_pass" class="oe_no_empty" />
      </xpath>
      <xpath expr="//t[@t-else='']/div[1]" position="after">
        <div t-field="survey.description_done_fail" class="oe_no_empty" />
      </xpath>
    </template>

  </data>
</odoo>