// index lieux tournage pays
function index_acf_google_map_address($params) {
    if ('films_acf_lieux_de_tournage_pays' == $params['facet_name']) {
        $address = $params['facet_value']['address']; // sinon essayer $params['facet_value'][0]['address']
        $params['facet_value'] = $address;
        $params['facet_display_value'] = $address;
    }
    return $params;
}

add_filter('facetwp_index_row', __NAMESPACE__ . '\\index_acf_google_map_address', 10, 2);