Display “NEW” Badge On Recently Added Items

add_action( 'woocommerce_before_shop_loop_item_title', 'wc_new_badge_shop_page', 3 );
          
function wc_new_badge_shop_page() {
   global $product;
   $newness_days = 30;
   $created = strtotime( $product->get_date_created() );
   if ( ( time() - ( 60 * 60 * 24 * $newness_days ) ) < $created ) {
      echo '<span class="itsnew onsale">' . esc_html__( 'New!', 'woocommerce' ) . '</span>';
   }
}