To add pagination to comments, you can use the following example:
You will need to set up the options in SETTINGS > DISCUSSION for paging to work.
The easiest way to do so is with the following function, which prints out a link to the next and previous comment pages, as well as a numbered list of all the comment pages.
$args = array( 'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ), 'format' => '?paged=%#%', 'current' => max( 1, get_query_var('paged') ), 'total' => $wp_query->max_num_pages, 'before_page_number' => '<span class="screen-reader-text">'.$translated.' </span>' ) ; paginate_comments_links($args);
This will give you the numbered pagination.
Hope this will help you.