A searchable guide to the complete WordPress Icon Library (@wordpress/icons) package from Gutenberg.
import { Icon, tableColumnBefore } from '@wordpress/icons';
<Icon icon={tableColumnBefore} />
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M19 3H5c-1.1 0-2 .9-2 2v14c0 1 .8 1.9 1.8 2H19.2c.9-.1 1.7-.9 1.8-1.8V5c0-1.1-.9-2-2-2Zm-5 16.5H5c-.3 0-.5-.2-.5-.5V5c0-.3.2-.5.5-.5h9v15Zm5.5-.5c0 .3-.2.5-.5.5h-3.5v-4h4V19Zm0-5h-4v-4h4v4Zm0-5.5h-4v-4H19c.3 0 .5.2.5.5v3.5Zm-11 7.3H10v-3h3v-1.5h-3v-3H8.5v3h-3v1.5h3v3Z"></path></svg>
tableColumnBefore – WordPress Icon Library