A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, accordionHeading } from '@wordpress/icons';
<Icon icon={accordionHeading} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path fill-rule="evenodd" clip-rule="evenodd" d="M19.5 12.75L9.5 12.75L9.5 11.25L19.5 11.25L19.5 12.75Z"></path><path d="M4.5 9.5L8.5 12L4.5 14.5L4.5 9.5Z"></path></svg>
accordionHeading – WordPress Icon Library