We have renamed Post Grid plugin to Post Grid Combohttps://pickplugins.com/rebranding-of-our-post-grid-plugin/

wcps_slider_after_items

add_action('wcps_slider_after_items','wcps_slider_after_items_20200331', 10, 2);

function wcps_slider_after_items_20200331($wcps_query, $args){

    ?>
    <p>Custom html after loop items</p>
    <?php

}

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