KDE: configure wacom tablet

I’d like to configure a wacom tablet (Wacom One Pen Display 13) on KDE Plasma (X11), notably when I use 2 screens so that it focusses only on a single screen, so I added:

  environment.systemPackages = with pkgs; [
    kdePackages.wacomtablet # Not sure which one I should add, tried this one first, then both
    wacomtablet
  ];

  services.xserver.wacom.enable = true;

to my configuration… Now, I can do

$ xsetwacom list devices
Wacom One Pen Display 13 Pen stylus     id: 11  type: STYLUS    
Wacom One Pen Display 13 Pen eraser     id: 23  type: ERASER  

to list the wacom device, but I can’t find the GUI to configure it. Runnig kde_wacom_tabletfinder just shows a basic GUI, but this seems to be used rather to check if it has been recognized properly, but I can’t find anything in System Settings → Input devices → Tablets. (the tablets tab does not exist, I have only keyboard, mouse, game controller, touchpad).

What am I doing wrong?