Hi @opus13
Have you tried to add the content dynamically like the following?
$fields = get_field('userlist', $post->ID);
if($fields){
foreach($fields as $field){
$content .= " " . $field['user']['user_firstname'] . " " . $field['user']['user_lastname'];
}
}
That code will add the user first and last name in the search excerpt.
Hope this helps 🙂