Accordion Pattern - Editorial change - Please make the button wrapping inside the heading element as optional

[shirsha]

For accordion pattern - Under "WAI-ARIA Roles, States, and Properties:" - the second bullet point:
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Each accordion header button is wrapped in an element with role heading that has a value set for aria-level that is appropriate for the information architecture of the page.
If the native host language has an element with an implicit heading and aria-level, such as an HTML heading tag, a native host language element may be used.
The button element is the only element inside the heading element. That is, if there are other visually persistent elements, they are not included inside the heading element.

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Can this be stated as optional?