What is 6s ios 16?

There is no such thing as 6s iOS 16 as of 2021. The latest iOS version for iPhone 6s is iOS 14.7.1. The iPhone 6s was first released in September 2015 and has since gone through several iOS software updates, benefiting from improved performance and security enhancements. While iOS 16 has not yet been released or confirmed by Apple, it is expected to be announced at the company's annual Worldwide Developers Conference (WWDC) in June 2022.