WooCommerce: Do Something When Product is Published

/**
 * @snippet       Hook into product publishing
 * @how-to        Get tutoraspire.com FREE
 * @author        Tutor Aspire
 * @compatible    WooCommerce 6
 * @donate $9     https://www.tutoraspire.com
 */

add_action( 'transition_post_status', 'tutoraspire_add_custom_meta_on_publish_product', 9999, 3 );

function tutoraspire_add_custom_meta_on_publish_product( $new_status, $old_status, $post ) {
   if ( 'product' === $post->post_type && 'publish' === $new_status && 'publish' !== $old_status ) {
      update_post_meta( $post->ID, 'total_amount', '0' );
   }
}