Apple is expected to reveal full details of iOS 16 at the upcoming Worldwide Developers Conference, which is scheduled from June 6 to 10. Ahead of that, a leaker has rounded up all the relevant feature rumors about iOS 16 and has also suggested device compatibility, leaving the Apple iPhone 6s, iPhone 6s Plus, and first-generation iPhone SE facing end of support.
https://www.notebookcheck.net/Apple-iOS-16-features-detailed-in-leak-roundup-as-iPhone-6s-and-iPhone-SE-1-face-likely-end-of-software-support.614912.0.html