A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, cautionFilled } from '@wordpress/icons';
<Icon icon={cautionFilled} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M12 4C7.58172 4 4 7.58172 4 12C4 16.4183 7.58172 20 12 20C16.4183 20 20 16.4183 20 12C20 7.58172 16.4183 4 12 4ZM12.75 8V13H11.25V8H12.75ZM12.75 14.5V16H11.25V14.5H12.75Z"></path></svg>
cautionFilled – WordPress Icon Library