Recently I noticed that the "lock" option had gone from this menu. Above these options are network, and then a bar for sound and brightness. I reinstalled gnome-control-center to no avail (and I did restart). I am hoping to find where the layout of this settings menu is stored and modify it to continue showing the lock option (as well as add other settings if possible).
I also followed the recommendations from this answer (looking for a duplicate .desktop file) which was not present.
Super + L not working on ubuntu 20.04
Leaving this open since it's tangential to a previously asked question but different. This fixed it.
