Missing some panels in
gnome-control-center? No "Online Accounts"? No "Sound"?
Apparently, panels are defined through .desktop files in
/usr/share/applications (!), and they mostly have the setting of
To trigger them appearing in, say,
xfce or similar, you need to pretend you're actually running GNOME by exporting the
XDG_CURRENT_DESKTOP variable with the value of
#!/bin/sh XDG_CURRENT_DESKTOP=GNOME gnome-control-center