I Changed the Menu Order, But the Page Order Didn’t Change on Front Page

By default, posts and pages are sorted after the date. If you want sort pages by “order” field, which is visible on edit page, you have to set orderby parameter:

add_action('pre_get_posts', 'change_order');

function change_order($query) {
    if ( is_front_page() || is_home() ) {
        $query->set( 'orderby', 'menu_order' );
        $query->set( 'order', 'ASC' );
    }
    return $query;
}

Put code in functions.php file.
More about orderby parameters you will find here.