Let's take a look at the identical twin of the detail disclosure button, the info button, it looks exactly the same. And an info button reveals configuration details about an app. Sometimes it does that on the back of the current view. That means when you tap the info button, the current view flips around and you see the extra information there. You're supposed to use the info button to reveal configuration details or options about an app. iOS includes two styles of the info button, a dark colored button that looks good on light backgrounds, and a light colored one that looks good on dark backgrounds.
You can also use the style of the info button that coordinates best with the UI of your app. One really distinguishable way of the info button being used was when It was popular to play this. Hi I can in the apps and tapping on it would reveal, for example, tips on how to use that app. Today in practice, there isn't a tangible difference between the info button and the detail disclosure button. So don't worry about that. Just use them to show extreme for or extra functionality.
That's it.