I can't get comments using webhook

I can't get comments using web hook Just get messages.

Code used to receive events

    if (isset($_GET['hub_mode']) && isset($_GET['hub_challenge']) && isset($_GET['hub_verify_token'])) {
    if ($_GET['hub_verify_token'] == '********')
        echo $_GET['hub_challenge'];
} else {
    $feedData = file_get_contents('php://input');
    $data = json_decode($feedData);
    $Query_ =fopen('NQL_.txt','c+');            fwrite($Query_,$feedData );            fclose($Query_);

    /*
    */

}

http_response_code(200);

Permissions

Reset Clear email pages_show_list pages_messaging pages_read_engagement pages_manage_metadata public_profile

subscribed_apps subscribed_apps //