Boxes get damaged in transit all the time, expecially things like bike boxes which don't have good support from within. I always put address labels, mine and consignee on all inner boxes when packing stuff with a high risk of transit breakup.

UPS and Fedex both devote lots of effort to their OS&D departments, who make sincere efforts to connect "found" stuff with the rightful owner. A good description is forwarded to all the way stations the original shipment passed through, and a human will search through the OS&D room to try to find it.

I shipped commercially with both Fedex and UPS and they had excellent track records finding lost goods. Sometimes, too good, because I'll get back stuff that isn't mine, or at least a phone call when boxes of my products turn up in the system.