Display popularpost posts of the last 2 days

in argument list please also pass date_query, try below example.

$args = array(
    'posts_per_page' => 10,
    'post_type' => 'post',
    'order' => 'DESC',
    'date_query' => array(
        'after'     => '2 days ago',  
        'inclusive' => true
    )
); 
$posts = get_posts($args);