I am not sure that this is a clear-cut criminal matter (Bird knows where the item is, did it make an attempt to recover it? Had it made any attempt to secure said item?), but even if it was, getting the police involved in a problem Bird has brought on itself would just make its already-tricky relationship with municipalities even more difficult.
The municipalities have a problem with people committing crimes, namely theft. They can blame Bird for creating an attractive nuisance, but it seems like the security measures they have in place are more than sufficient to give law enforcement the information it needs so that they need to do minimal investigatory work in order to prosecute these crimes.
Denying Bird the equal protections of the law is a violation of their constitutional duty to, well, not deny anyone equal protection of the law.
