Apache Modules (expires, header, filter) not detected

Hi there, I was directed from Wordpress forums to this forum here. I am using a free speedoflight WordPress installation and see some alaerts conderning Apache modules that are markled not to be active. the hoster affirms that they are active...

I receive the following alerst in SpeedofLight System check:

“Mod_Expires infoApache module Expires NOT detected. This module is required to setup cache expiration periods for specific files (JS, CSS…) in web browsers. This is definitively recommended for a better performance”

I get this also for the Apache modules ‘headers’ and ‘filter’ aswell.
my hoster affirms that these modules are activated, by checking this:

root@af9b8:~# a2enmod headers
Module headers already enabled
root@af9b8:~# a2enmod filter
Module filter already enabled
root@af9b8:~# a2enmod expires
Module expires already enabled
root@af9b8:~# date
Mon Sep 24 09:21:11 CEST 2018
root@af9b8:~#

Do you have an idea why SpeedofLight might find an error here?
My hosting company is a german hoster / netcup… but I see this at ‘strato’ (one of the big ones) aswell.

thanks in advance
Pedro