Thanks for you answer.
I actually found the problem. A rookie mistake. I used a different Name than the one I used in my Hub configuration.
So now I have the one switch availbale and also I saw the file where I see all the devices HA detected from the Harmony.
I didn’t manage so far to add more switches so I can actually use all the devices I set up with the Harmony.
The best description I found to use the full functionality of the harmony channelwise was Logitech Harmony Integration with @iandday's component
Is this the easiest way for the Harmony setup?