iPhone 15 updated with IOS 18 beta test

Here is Apple communication, dated sept 9.

The first set of Apple Intelligence features will be available in beta next month as part of iOS 18.1,

https://www.apple.com/newsroom/2024/09/apple-intelligence-comes-to-iphone-ipad-and-mac-starting-next-month/#:~:text=free%20software%20update.-,The%20first%20set%20of%20Apple%20Intelligence%20features%20will%20be%20available,in%20the%20months%20to%20come.

Apple Intelligence will be available as a free software update. The first set of Apple Intelligence features will be available in beta next month as part of iOS 18.1, iPadOS 18.1, and macOS Sequoia 15.1, with more features rolling out in the months to come. It will be available on iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max, iPhone 15 Pro, iPhone 15 Pro Max, and iPad and Mac with M1 and later, with device and Siri language set to U.S. English. Additional languages and platforms are coming over the course of the next year.

You can get it with 18.1, but trust me you aint missing much.