A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, upload } from '@wordpress/icons';
<Icon icon={upload} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M18.5 15v3.5H13V6.7l4.5 4.1 1-1.1-6.2-5.8-5.8 5.8 1 1.1 4-4v11.7h-6V15H4v5h16v-5z"></path></svg>
upload – WordPress Icon Library