How to add “New” badge in recent post widgets in WordPress

function recent_posts_with_badge() {
    
    $args = array(
        'posts_per_page' => 8 
    );
    
    $the_date_today = date('r');
    
    $the_query = new WP_Query( $args );
    if ( $the_query->have_posts() ) {
        echo '<div><ul>';
        while ( $the_query->have_posts() ) {
            $the_query->the_post();
            
            $each_post_date = get_the_time('r');
            $difference_in_days = round( ( strtotime( $the_date_today ) - strtotime( $each_post_date) ) / ( 24 * 60 * 60 ), 0 );
            
            if ( $difference_in_days <= 2 ) {
                echo '<li><a href="' . get_the_permalink() .'">' . get_the_title() .' <span>New</span></a></li>';
            } else { 
                echo '<li><a href="' . get_the_permalink() .'">' . get_the_title() .'</a></li>';
            }

        }
        echo '</ul></div>';
    }
    
    wp_reset_postdata();
}

add_shortcode('badgeposts', 'recent_posts_with_badge');