Yeah, unfortunately it seems like the only requirement (in the state of Delaware, anyway) to be a "public benefit corporation" is to say "we are a public benefit corporation" in a somewhat serious-sounding way in your incorporation documents.

Then you can use those weighty words everywhere to impress people while still being just as profit-motivated as any other public company. Sort of an insult to PBCs that actually do provide a public good. And these rules vary by state is my understanding. Perhaps your company was incorporated somewhere else.