Not Seeing the New Siri After Updating to iOS 18.3? Here's Why
The latest updates (iOS 18.3, iPadOS 18.3 and MacOS Sequoia 15.3) now enable Apple Intelligence automatically, even though it's still considered a beta feature. If you never signed up for the waitlist, or this is your first jump to iOS 18 from iOS 17, for example, Apple Intelligence should be on and the new Siri interface should appear.