There's a good chance that apartment building has easy to find organized unit numbers that pizza delivery guy can understand. Building may even have multiple front entrances each with distinct addresses.
Once saw a (German) documentary about this building. They have drop-off places on the ground floor where delivery drivers leave their goods in locked boxes. Payment and and locking/unlocking of the box is done digitally through phone.
The luxury floors should have automated dumbwaiters, so there's a little rectangle in the wall that's basically a primitive replicator. Trash leaves through the same chute.
Pizza Hut makes a deal with the government to put all the pepperoni customers on the same floors, veggie people on other floors, etc. The lava cake freaks... there's a special floor for them.
Yeah, I've delivered pizza in a city of over 100k people. The whole idea of an address is to figure out where the destination is down to the personal residence. Doesn't matter if the people are spread out in a single building or many buildings.
I didn't go knocking on every door any time someone ordered pizza to an apartment. Biggest concern about apartments were if they had a buzzer, if that buzzer worked, and if the code matched the unit number or would be easy to figure out based on the information provided. And if it wasn't, their phone number was part of the information provided.