Various HTML patterns found for FAQ markup

seo-faq-_semantic.html

<!-- Unordered List Semantic Markup (Recommended) //-->

<h3>Frequently Asked Questions (FAQ)</h3>
<ul>
    <li class="faqItem">
        <p class="question">This is a question?</p>
        <p class="answer">This is an answer</p>
    </li>
    <li class="faqItem">
        <p class="question">This is a question?</p>
        <p class="answer">This is an answer</p>
    </li>
</ul>

seo-faq-basic.html

<!-- Basic Semantic Markup //-->
<h3>Frequently Asked Questions (FAQ)</h3>
<div>
    <h4 class="question">This is a question?</h4>
    <p class="answer">This is an answer</p>
</div>
<div>
    <h4 class="question">This is a question?</h4>
    <p class="answer">This is an answer</p>
</div>

seo-faq-extra-semantic.html

<!-- Feeling 'Extra'? Try section, details, summary //-->
<h3>Frequently Askwed Questions (FAQ)</h3>
<section>
    <details open>
        <summary class="question">This is a question>?</summary>
        <p class="answer">This is an answer</p>
    </details>
</section>
<section>
    <details open>
        <summary class="question">This is a question?</summary>
        <p class="answer">This is an answer</p>
    </details>
</section>

seo-faq-schema-json-ld.html

<!-- Via Google Documentation https://developers.google.com/search/docs/appearance/structured-data/faqpage#examples //-->
<script type="application/ld+json">
    {
      "@context": "https://schema.org",
      "@type": "FAQPage",
      "mainEntity": [{
        "@type": "Question",
        "name": "What is the return policy?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "<p>Most unopened items in new condition and returned within <b>90 days</b> will receive a refund or exchange. Some items have a modified return policy noted on the receipt or packing slip. Items that are opened or damaged or do not have a receipt may be denied a refund or exchange. Items purchased online or in-store may be returned to any store.</p><p>Online purchases may be returned via a major parcel carrier. <a href=https://example.com/returns> Click here </a> to initiate a return.</p>"
        }
      }, {
        "@type": "Question",
        "name": "How long does it take to process a refund?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "We will reimburse you for returned items in the same way you paid for them. For example, any amounts deducted from a gift card will be credited back to a gift card. For returns by mail, once we receive your return, we will process it within 4–5 business days. It may take up to 7 days after we process the return to reflect in your account, depending on your financial institution's processing time."
        }
      }]
    }
    </script>

These are examples of the HTML structured found on popular websites that have the FAQ SERP features on their Google listings