Related Downloads Below Each Download

$wpide_edd_related_count = 4; // Downloads to show.

add_action( 'edd_after_download_content', function ( $download_id ) use ( $wpide_edd_related_count ) {
    $ids = get_transient( 'wpide_edd_related_' . $download_id );

    if ( false === $ids ) {
        $terms = wp_get_post_terms( $download_id, 'download_category', array( 'fields' => 'ids' ) );
        $ids   = array();

        if ( $terms && ! is_wp_error( $terms ) ) {
            $ids = get_posts( array(
                'post_type'      => 'download',
                'post_status'    => 'publish',
                'posts_per_page' => $wpide_edd_related_count,
                'post__not_in'   => array( $download_id ),
                'fields'         => 'ids',
                'no_found_rows'  => true,
                'orderby'        => 'rand',
                'tax_query'      => array( array( 'taxonomy' => 'download_category', 'terms' => $terms ) ), // phpcs:ignore WordPress.DB.SlowDBQuery
            ) );
        }

        set_transient( 'wpide_edd_related_' . $download_id, $ids, $ids ? 12 * HOUR_IN_SECONDS : HOUR_IN_SECONDS );
    }

    if ( ! $ids ) {
        return;
    }

    echo '<section class="wpide-edd-related"><h3>' . esc_html( 'You may also like' ) . '</h3><ul style="display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:1em;list-style:none;padding:0">';

    foreach ( $ids as $id ) {
        printf(
            '<li><a href="%1$s">%2$s<span style="display:block;margin-top:.4em">%3$s</span></a>%4$s</li>',
            esc_url( get_permalink( $id ) ),
            get_the_post_thumbnail( $id, 'medium', array( 'style' => 'width:100%;height:auto' ) ),
            esc_html( get_the_title( $id ) ),
            wp_kses_post( edd_price( $id, false ) )
        );
    }

    echo '</ul></section>';
}, 20 );

add_action( 'save_post_download', function ( $post_id ) {
    delete_transient( 'wpide_edd_related_' . $post_id );
} );