Solution:
To solve this using the following:
window.onload = function () {
jQuery(document).ready()
jQuery(function(){
jQuery( ".add-pe" ).click(function() {
var dataId = jQuery(this).attr("data-id")
var title = jQuery(this).attr("title")
jQuery(".values-list").append('<li><input type="hidden" name="acf[field_61e58083d6d49][]" value="' + dataId + '"><span data-id="' + dataId + '" class="acf-rel-item">' + title + '<a href="#" class="acf-icon -minus small dark" data-name="remove_item"></a></span></li>');
});
});
};
<p><a class="add-pe btn btn-secondary btn-sm mt-4" data-id="<?php echo $post_ID; ?>" title="<?php echo $title?>">Add to claim</a></p>