Schoebi Really? it is too hard to read how to install a package?
Then KaOS is the complete wrong distro, installing a package group is far simpler than maintaining a rolling distribution. KaOS will never work for you if reading about a few simple commands is not an option. Plus as the links posted for you have shown a few times, KaOS is a limited distribution, if the 2000-2100 available for you are not enough and you do not want to build and maintain those you are missing, then you really should look for a distro that has much larger repositories.