WooCommerce New Order Email to different recipient based on customer's city

mr_wc_new_order_email_recipient.php

        /**
        * Add another email recipient for admin New Order emails if a shippable product is ordered for a specific city
        *
        * @param string $recipient a comma-separated string of email recipients (will turn into an array after this filter!)
        * @param \WC_Order $order the order object for which the email is sent
        * @return string $recipient the updated list of email recipients
        */
        function mr_wc_conditional_email_recipient( $recipient, $order ) {
          // Bail on WC settings pages since the order object isn't yet set yet
          // Not sure why this is even a thing, but shikata ga nai
          $page = $_GET['page'] = isset( $_GET['page'] ) ? $_GET['page'] : '';
          if ( 'wc-settings' === $page ) {
            return $recipient;
        }
  
        // just in case
        if ( ! $order instanceof WC_Order ) {
          return $recipient; 
        }
        $items = $order->get_items();

        $billing_city =  $order->get_billing_city();
        $billing_city = array();
        $customer_city = array('New York');
  
        // check if a shipped product is in the order 
        foreach ( $items as $item ) {
          $_product = $order->get_product_from_item( $item );

          // add our extra recipient if there's a shipped product - commas needed!
          // we can bail if we've found one, no need to add the recipient more than once
          if ( $_product && $_product->needs_shipping() && in_array( $billing_city, $customer_city) ) {
            $recipient .= ', [email protected]';
            return $recipient;
          }
        }

        return $recipient;
      }
      add_filter( 'woocommerce_email_recipient_new_order', 'mr_wc_conditional_email_recipient', 10, 2 );


      // Ensures Mail header is properly set so emails are not sent to spam folder
      add_filter( 'woocommerce_email_headers', 'add_bcc_to_wc_admin_new_order', 10, 3 );
      function add_bcc_to_wc_admin_new_order( $headers = '', $id = '', $wc_email = array() ) {
          if ( $id == 'new_order' ) {
              $headers .= "Bcc: [email protected]\r\n";
          }
          return $headers;
      }