Modify Existing Trigger Content To Show Product Views Just like any other trigger.

wcst_show_product_views.php

<?php
/**
 * Show number of people viewing this product by modifying existing trigger content
 */
add_filter('wcst_guarantee_display_content', 'wcst_guarantee_display_content_modify', 10, 5);

/**
 * Modifies and HTML for a existing trigger to show number of people viewing this product
 * @hooked over `wcst_guarantee_display_content`
 * @param string $gurantee_html Existing Guarantee HTML
 * @param array $guarantee_single Configurations
 * @param integer $trigger_ID
 * @param XL_WCST_Product $productInfo
 * @param WCST_Trigger_Guarantee $trigger
 * @return String Target Html
 */
function wcst_guarantee_display_content_modify($gurantee_html, $guarantee_single, $trigger_ID, $productInfo, $trigger)
{

    $trigger_id_to_override = "xxxx"; // Specify trigger

    if ($trigger_ID != $trigger_id_to_override) {
        return $gurantee_html;
    }

        
    $string = sprintf(__('There are currently %d viewing this product.'), rand(5,15) ); // Here we are priniting random value between 5 to 15, you can replace this part with your own logic
    $string = do_shortcode(WCST_Merge_Tags::maybe_parse_merge_tags($string, $trigger->slug));

    return '<div class="wcst_on_product wcst_guarantee_box wcst_using_snippet wcst_guarantee_box_key_'.$productInfo->product->get_id().'_' . $trigger_ID . '"> <div class="wcst_guarantee_box_row wcst_clear"><div class="wcst_guarantee_box_text wcst_no_padding"><p> ' . $string . '</p></div></div> </div>';
}