Is there a way to add the word "views" after the number?

Please try this:

<?php

/**
 * Filters tptn_list_count.
 *
 * @param	$string	$tptn_list_count	Formatted list count
 */
function filter_tptn_list_count( $tptn_list_count ) {
	$tptn_list_count = str_replace(? ')', 'views)', $tptn_list_count );

	return $tptn_list_count;
}
add_filter( 'tptn_list_count', 'filter_tptn_list_count' );