No it’s just a typical smart socket and I’ve put my phone charger in it. (an old 1 amp charger so it is easier on the battery.) The 60% button turns the switch on for about three hours for example. (Phone has 5A battery.)
The charger is on from midday in case I forget to select a charging amount before sleeping.
You could do similar with an old fashioned rotary mechanical timer socket.
I wonder if the concern is that unlocking the phone might allow you to run some form of data recovery on it and thus obtain access to some of the previous owner’s info?