Default

This is a heading 2

<section>
  <h2>This is a heading 2</h2>
</section>

section with aria-labelledby

This is a heading 2

<section aria-labelledby="section_heading">
  <h2 id="section_heading">This is a heading 2</h2>
</section>

section with aria-label

This is a heading 2

<section aria-label="This is a heading 2">
  <h2>This is a heading 2</h2>
</section>