Are you friendly with the neighbor? Like did they see your name and go “oh I’m gona take this”.

Or did a random person get a random $400+ device and get really excited, then give it to the rightful owner when requested?

I guess it depends where you live? If you live in an apartment building maybe you ask around to see if the name is of anyone in the building?

But you said across the street. Idk it doesn’t really feel like the neighbor did anything wrong here from first glance.