I have a question because in openSUSE with gnome we have already installed the application store and in openSUSE with KDE is not installed by default the KDE Discover?
And what is your question? 
No, discover is not installed by default. We have YaST as package manager anyway.
But it has been added to the default KDE pattern recently, so it will get installed by default in the future (Leap 15.0, and Tumbleweed before that).
Thank you very much for the answer!