We learned at WWDC that there are quite a few devices which won’t get iOS/iPadOS 16: The iPhone 6s, 6s Plus, 7, 7 Plus, the original SE, iPod 7G, iPad Air 2 and iPad Mini 3 & 4 are now all stuck on iOS 15.
The new iPhone/iPad Specs Matrix reflects these updates and also adds the new iPhone SE and the iPad Air 5, introduced in March. I also corrected two errors from the previous version (wrong RAM number for iPhone 11 and iPad Pro 9.7″). Thanks to Frank Herberg and usws for pointing that out!