You are. What you’re talking about are virtual desktops or virtual workspaces.
I said “desktop environments”, which is a specific thing in Linux. It’s the GUI and suite of tools that come with it. They all tend to have a usecase in mind and different philosophy. There’s Gnome, KDE Plasma, xfce, lxde, Budgie, Cinnamon, Sway, and a whole bunch more that I can’t remember.