Are you using multiple Activities, or have you configured the
default
Activity to have a folder view? Note that the standard desktop
background in KDE is not a folder so you have to enable this. Perhaps
someone more knowledgeable about Activities can chip in here.
I do not know what is an "activity" but yes I am using the "Folder"
view ("Dossier" in French) and in "location" ("Emplacement"
in
French), I chose "Display the desktop folder" ("Afficher le dossier du
bureau").
I know that we can have a component on the desktop showing the desktop
folder but I am not using this.
Frédéric