To quote the most salient post

The app doesn’t provide client-side scanning used to report things to Google or anyone else. It provides on-device machine learning models usable by applications to classify content as being spam, scams, malware, etc. This allows apps to check content locally without sharing it with a service and mark it with warnings for users.

Which is a sorely needed feature to tackle problems like SMS scams

Seems suspicious. There probably is such an option hidden somewhere. Because whenever you get a clear answer there, it’s invariably wrong.