function cs_add_order_again_to_my_orders_actions( $actions, $order ) {
if ( $order->has_status( 'completed' ) ) {
$actions['order-again'] = array(
'url' => wp_nonce_url( add_query_arg( 'order_again', $order->id ) , 'woocommerce-order_again' ),
'name' => __( 'Order Again', 'woocommerce' )
);
}
return $actions;
}
add_filter( 'woocommerce_my_account_my_orders_actions', 'cs_add_order_again_to_my_orders_actions', 50, 2 );
Above code is used for the re order