Mail
Smart search corrections
Intelligent search improves your results by correcting typos and using synonyms for your search terms.
Smart search suggestions
See a richer view of shared content and more from the moment you begin to search for email messages.
Spotlight
Search on Home Screen
Spotlight can be accessed directly from the bottom of the Home Screen, making it easy to open apps, find contacts, or get information from the web.
Improved Siri Suggestions
Recents searches allow you to quickly revisit a result. Siri Suggestions now consider your context, so you can do things faster like navigating to your next meeting or checking the status of your upcoming flight.
Image search in more apps
Spotlight uses information from images in Messages, Notes, and Files to enable searching by locations, people, scenes, or even things in the images, like text, a dog, or a car
https://www.apple.com/ios/ios-16-preview/features/