Seeing enhanced notifications adding, e.g., "track flight" links below a notification that just mentions "airline" and a flight number, I wondered who exactly processes notification content to generate such enhancements. A web search did not turn up a definitive answer, just vague allusions to "AI" or "machine learning".
So: is notification content processed locally on the device, to generate enhanced notifications? I'm slightly worried since the Enhanced Notifications setting is turned on, by default.