Well, good for them, Holly! I'd be curious to know something about the perp, also about how they got caught.
Here, due to all the shopping online, the delivery people, particularly from Amazon, have been overwhelmed. They are supposed to bring every package too large to fit inside a mailbox to the apartment door, and ring the bell. More and more often, they are not bothering to do that, probably because they are under time constraints. So the table in the lobby has been collecting lots of packages, until a resident recognizes a name and takes it (if theirs) or kindly delivers it to a neighbor. Seems like a perfect setup for the kind of theft you just experienced.
There is a very stern warning sign on the table, saying, "Please do not leave packages in the lobby. Your delivery is not completed until the package is brought to the apartment." It's often just ignored, they leave the packages anyway.
Fortunately, this is not a high crime building, and most people passing through the lobby are the senior residents. If it was a general public space, this could be a nightmare.