How to inject custom content between the reviews

To do this, you will need to use a custom reviews.php template in your child theme as explained in the Site Reviews > Help & Support > FAQ page.

For example, change this:

<div class="glsr-reviews-wrap">
    <div class="{{ class }}">
        {{ reviews }}
    </div>
    {{ pagination }}
</div>

To this:

<div class="glsr-reviews-wrap">
    <div class="{{ class }}">
    <?php
        if (empty($reviews)) {
            echo '{{ reviews }}'; // display the fallback text
        }
        foreach ($reviews as $index => $review) {
            $review->render($args->toArray());
            if (2 === $index) { // $index starts at 0
                // render custom stuff here...
            }
        }
    ?>
    </div>
    {{ pagination }}
</div>