Show publish lists in 2nd paragraph

Hiya nice WordPress builders, I wish to record posts from a specif class within the 2nd or center paragraph of the publish.

I attempted including some scripts to my perform.php to attain that, however I could not get the 2nd or center paragraph of the article, which is the important thing half, to work.

perform custom_related_posts( $content material ) {
    world $publish;
    $current_post_id = get_the_ID();
    $html = '';

    if ( is_singular( 'publish' ) ) {

        //get the classes of the present publish
        $cats = get_the_category( $current_post_id );
        $cat_array = array();

        foreach ( $cats as $key1 => $cat ) {
            $cat_array[ $key1 ] = $cat->slug;
        }

        //get the tags of the present publish
        $tags = get_the_tags( $current_post_id );
        $tag_array = array();

        foreach ( $tags as $key2 => $tag ) {
            $tag_array[ $key2 ] = $tag->slug;
        }

        $related_posts = new WP_Query(
            array(
                'post_type' => 'publish',
                'post_status' => 'publish',
                'tax_query' => array(
                    'relation' => 'OR',
                    array(
                        'taxonomy' => 'class',
                        'area' => 'slug',
                        'phrases' => $cat_array
                    ),
                    array(
                        'taxonomy' => 'post_tag',
                        'area' => 'slug',
                        'phrases' => $tag_array
                    )
                ),
                'showposts' => 6,
                'post_type' => array( 'publish' ),
                'category_name' => 'songs',
                'orderby' => 1 
            )
        );
        if ( $related_posts->have_posts() ) {
            $html .= '<div class="related-posts"><h3>Associated posts</h3><ul class="related_post wp_rp">  ';

            whereas ( $related_posts->have_posts() ) {
                $related_posts->the_post();
                $html .= '<li data-position="0" data-poid="in-215276" data-post-type="none"><a rel="bookmark" class="wp_rp_thumbnail" href="';
                $html .= get_the_permalink();
                $html .= '">';

                if ( has_post_thumbnail( $post->ID ) ) {
                    $picture = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'medium' );
                    $html .= '<img class="featured-image" src="' . esc_url( $image[0] ) . '">';
                }

                $html .= '<a category="wp_rp_title" fashion="color:#333333" href="';
                $html .= get_the_permalink();
                $html .= '">';
                $html .= '' . get_the_title() . '';
                $html .= '</a>';
                $html .= '</li>';
            }
            $html .= '</ul></div>';
            wp_reset_postdata();
        } else {
            $html .= '<div class="related-posts">' . esc_html__( 'No associated posts have been discovered.', 'textdomain' ) . '</div>';
        }
        $content material .= $html;
    }
    return $content material;
}
add_filter( 'the_content', 'custom_related_posts' ); 

Put up hyperlink: https://www.voxlyrics.com/drake-fountains-ft-tems/