A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, headingLevel5 } from '@wordpress/icons';
<Icon icon={headingLevel5} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M9 11H5V7H3v10h2v-4h4v4h2V7H9v4zm11.7 1.2c-.2-.3-.5-.7-.8-.9-.3-.3-.7-.5-1.1-.6-.5-.1-.9-.2-1.4-.2-.2 0-.5.1-.7.1-.2.1-.5.1-.7.2l.1-1.9h4.3V7H14l-.3 5 1 .6.5-.2.4-.1c.1-.1.3-.1.4-.1h.5c.5 0 1 .1 1.4.4.4.2.6.7.6 1.1 0 .4-.2.8-.6 1.1-.4.3-.9.4-1.4.4-.4 0-.9-.1-1.3-.3-.4-.2-.7-.4-1.1-.7 0 0-1.1 1.4-1 1.5.5.4 1 .8 1.6 1 .7.3 1.5.4 2.3.4.5 0 1-.1 1.5-.3s.9-.4 1.3-.7c.4-.3.7-.7.9-1.1s.3-.9.3-1.4-.1-1-.3-1.4z"></path></svg>
headingLevel5 – WordPress Icon Library