Install a firewall app and restrict access for every app on your phone?

I mean, how’s this supposed to work? If your boss is like

“hey, has anyone seen XYZ, I heard them earlier and saw them in the hallway, but I can’t find them now?”

“they went back home”

“WTF”

I get the idea, but I don’t see how this is a long term or even particularly practical solution to a boss that wants you back in the office?