Hi
I've just installed Ubuntu 24.04.3 LTS on a Clevo NS5AU.
I've change the dconf value /org/gnome/settings-daemon/plugins/power/lid-close-suspend-with-external-monitor to true but closing the laptop while a external monitor is present does not suspend the system, the external monitor becomes the primary display.
Also, the systemd-logind has not this option.
Regards & cheers.