I find it interesting to look at the differences between the localized versions of this page. Largely the same, but not entirely! English: https://www.apple.com/ios/ios-15/ Chinese: https://www.apple.com.cn/ios/ios-15/ Japanese: https://www.apple.com/jp/ios/ios-15/
Care to mention the major differences?
- "ID cards"
- Weather: "precipitation" isn't mentioned, and Weather app is just more "powerful", not "more engaging and powerful" (US). Air Quality maps are available for India, not sure about other maps.
- Immersive walking directions
- redesigned transit map
- Nearby transit
- Home Keys does not mention "Hotel Keys" or "Corporate Access Badges"
- Car Keys
- Visual lookup learning
- Share health data with your doctor
- Lab results enhancements
- Apple Card
- Buy directly from the Search tab
- 5G
- Redesigned News feed
- Podcasts: Personalized recommendations
- Next-hour precipitation notifications
Comparison based on the following links: