Confirming: KDE/Plasma has it natively. You can configure number of rows and columns, whether movement should be cyclic or not, and shortcuts to change desktop and to bring windows to other desktops. You can create and remove new virtual desktops on the spot by right-clicking the tray icon. Also shortcuts to get an overview of all desktops at once.
KDE also has a slightly different way of separating workspaces: “Activities” (which can co-exists with virtual desktops); although I don’t use it.