A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, plusCircleFilled } from '@wordpress/icons';
<Icon icon={plusCircleFilled} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M2 12C2 6.44444 6.44444 2 12 2C17.5556 2 22 6.44444 22 12C22 17.5556 17.5556 22 12 22C6.44444 22 2 17.5556 2 12ZM13 11V7H11V11H7V13H11V17H13V13H17V11H13Z"></path></svg>
plusCircleFilled – WordPress Icon Library