Thank you for your fast reply and explaining what makes it more or less impossible to do a one-click solution!
I think I just have to “play” a little with HA and unterstand the difference between entities and attributes before I actually start to get everything into HA.
I know there a good tutorials for integrating KNX into HA on YouTube. I will just start from there.
Unfortunately, I am only an end user and I don’t think I can be of any help! But I will report all bugs I might encounter.