What do you think?
Police won't or can't do anything if it could be in multiple units or would require any kind of warrant for the building as well as the specific unit you think it's in.
If you're "lucky" some might chaperone you knocking yourself, which itself is not something most want to entertain.
On account of police policy, AirTags are effectively useless for actually getting anything stolen back. You'll get more use out of them in filing your insurance claim if the theft of the item is covered under for example your homeowner's insurance policy.