Related Posts – Snippet

Hi…

I am adding a snippet to call related posts like so:

<?php

// ********* BEGIN HERE *********

function cc_related_posts($args = array()) {

    global $post;

    // default args
    $args = wp_parse_args($args, array(
        'post_id' => !empty($post) ? $post->ID : '',
        'taxonomy' => 'category',
        'limit' => 3,
        'post_type' => !empty($post) ? $post->post_type : 'post',
        'orderby' => 'rand'
    ));

    // check taxonomy
    if (!taxonomy_exists($args['taxonomy'])) {
        return;
    }

    // post taxonomies
    $taxonomies = wp_get_post_terms($args['post_id'], $args['taxonomy'], array('fields' => 'ids'));

    if (empty($taxonomies)) {
        return;
    }

    // query
    $related_posts = get_posts(array(
        'post__not_in' => (array)$args['post_id'],
        'post_type' => $args['post_type'],
        'tax_query' => array(
            array(
                'taxonomy' => $args['taxonomy'],
                'field' => 'term_id',
                'terms' => $taxonomies
            ),
        ),
        'posts_per_page' => $args['limit'],
        'orderby' => $args['orderby'],
        'order' => $args['order']
    ));

    if (!empty($related_posts)) { ?>
        <div class="related-posts">
            <h3 class="widget-title"><?php _e('Related articles', 'textdomain'); ?></h3>

            <ul class="related-posts-list">
                <?php
                foreach ($related_posts as $post) {
                    setup_postdata($post);
                    ?>
                    <li>
                        <a class="title" href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
                            <?php if (has_post_thumbnail()) { ?>
                                <div class="thumb">
                                    <?php echo get_the_post_thumbnail(null, 'medium', array('alt' => the_title_attribute(array('echo' => false)))); ?>
                                </div>
                            <?php } ?>
                            <h4><?php the_title(); ?></h4>
                        </a>
                    </li>
                <?php } ?>
            </ul>
            <div class="clearfix"></div>
        </div>
        <?php
    }

    wp_reset_postdata();
}

Article says: The next step is to call the function?cc_related_posts()?wherever you want in your template. Usually, you’ll want to add it in the?single.php?file after calling?the_content().

How do I add this to single post template in TT4 (Block theme). How do I call this function and place it where, since I have no single.php. I think