The surveillance dystopia we are racing towards is only criticized if the facial recognition cameras spying on our every move work slightly worse on black people.
In this case, a phone is a device that is known to, at minimum, track your location, and now the landlord wants to run their code on it that you have only their word to trust is not nefarious, and can log every entry and exit to your apartment.
What % of the population own such a device is utterly irrelevant to whether its use should be mandatory to obtain shelter.