When presenting a small piece of extra information on the screen, showing a modal view is essential. With UIKit, we could do this with `presentViewController:animated:completion:` [function](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621380-presentviewcontroller). However, using SwiftUI, we need to twist our thinking towards using view or environment state, as the modal view is now called a sheet.