The Android Pie update removed the shortcut to activate split-screen mode by long pressing the overview button. However, an app has been developed to fix this issue. The app adds optional shortcuts to toggle Android's split-screen mode, including long pressing the home button, back button, and overview button. Additionally, users can tap the accessibility button or a notification in the notification drawer to activate split-screen mode. The app also includes a pinnable shortcut to toggle split-screen mode, which is intended to be used by third-party apps like Automate.

In addition to the split-screen mode shortcuts, the app offers an extra feature that allows users to emulate the home press on split. This feature can be accessed through the "More settings..." option.

Overall, this app provides a solution for Android Pie users who miss the shortcut to activate split-screen mode. With multiple shortcut options and an additional feature, users can easily toggle split-screen mode on their devices.