How to get the iOS 16 features?

The iPhone 16 does not exist.

I assume that you're talking about iOS 16. If you have a compatible iPhone, you can install iOS 16 via settings>software update.

The iPhone 8 and higher are capable of running iOS 16

To get these features, your iPhone has to be able to upgrade to iOS 16. Which iPhone do you have? The picture below will give you an idea of whether or not yours is eligible.

yes.