A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, customPostType } from '@wordpress/icons';
<Icon icon={customPostType} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M4 20h9v-1.5H4V20zm0-5.5V16h16v-1.5H4zm.8-4l.7.7 2-2V12h1V9.2l2 2 .7-.7-2-2H12v-1H9.2l2-2-.7-.7-2 2V4h-1v2.8l-2-2-.7.7 2 2H4v1h2.8l-2 2z"></path></svg>
customPostType – WordPress Icon Library