Subcategory List with Post Counts

Hi! I love the shortcode for displaying all Ads with Post Counts, is there a way to Display a category with subcategories and post count only, not All or Top?
I would like to choose 1 category and display with all subcategories in a list with post counts next, i did find a function if this is not possible with shortcode, what do you think?

function wp_get_cat_postcount($id) {
    $cat = get_category($id);
    $count = (int) $cat->count;
    $taxonomy = 'category';
    $args = array(
      'child_of' => $id,
    );
    $tax_terms = get_terms($taxonomy,$args);
    foreach ($tax_terms as $tax_term) {
        $count +=$tax_term->count;
    }
    return $count;
}

	
The total number of posts under "My Awesome Category" is <?php echo wp_get_cat_postcount(2); ?>