> Does anyone know if ALP is still going to support KDE?
Even today, SLE 15.x does not include KDE. The only GUI option is GNOME 3, or IceWM if you choose not to have a full desktop.
You need to add community repos to install KDE, and I suspect that if you do that, it is no longer supported. (This was not my area when I worked there, so this is not an _ex cathedra_ verdict.)
So I am going to take a guess and say that the answer will be "no".