/usr/share/gdm/greeter/applications/setup-shell.desktop is in gnome-initial-setup 3.28.0-2ubuntu6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | [Desktop Entry]
Type=Application
Name=GNOME Shell
Exec=gnome-shell --mode=initial-setup
X-GNOME-AutoRestart=true
X-GNOME-Autostart-Phase=DisplayServer
X-GNOME-Provides=panel;windowmanager;
X-GNOME-Autostart-Notify=true
X-Ubuntu-Gettext-Domain=gnome-initial-setup
|