Google showed how predictive back gesture will work inside apps in Android 14.
At Google I/O 2022, the company announced updates to Android's gesture navigation. n. Now when you swipe the gesture back, you will see a preview of the screen where you go. In Android 13, this feature is available in test mode as a toggle in the developer options and only in apps that support it. And at the moment, it only shows the preview of the home screen.
In Android 14, the predictive back gesture will be able to show the previous screen within the app. Thus, when navigating, you will always know if you are going back a step or if you are already on the last page before exiting the app.
Android Dev Summit'22
Android Developers
