I recognize that it is possible to exit the application by using the "Exit function". However, PowerApps returns the application list screen thus it cannot be closed. Usually, the PowerApps application automatically starts up when using a Web link, and you can utilize the created Apps by launching application created with PowerApps. On the other hand, you need to manually close the PowerApps application when you exit them so far.
In order to improve usability, it would be great that if you could make a feature implementation that enables closing of both the application and PowerApps application at once by applying the button created.(Or the specific "function")