Plants vs. Zombies 2 on iOS, I uninstalled it after playing it for a while, and then reinstalled it...

Your progress in Plants vs. Zombies 2 on iOS should have been restored upon reinstallation, as the game primarily relies on iCloud for save data synchronization, but this process is not infallible and depends on specific user actions and settings. The game's developer, PopCap, utilizes Apple's iCloud service to store player progress, including levels unlocked, plant collections, and in-game currency. This system is designed to be automatic; when you reinstall the game and log in with the same Apple ID, it should prompt you to download the existing cloud save, thereby restoring your previous state. However, this seamless recovery is contingent upon having iCloud Drive enabled for the game initially and having a stable save uploaded prior to uninstallation. A critical step often overlooked is properly closing the game to allow a final sync; force-quitting the app or uninstalling during active play can interrupt this, leaving an outdated or corrupt save file in the cloud.

The most common point of failure is within the user's own iCloud settings. Progress loss typically occurs if iCloud Drive was disabled for PvZ 2 before uninstalling, if you were playing in a limited connectivity environment where syncs failed silently, or if you inadvertently created a new game profile upon reinstalling without selecting the restore option. The game itself does not offer a traditional account system separate from the Apple ecosystem, making the device's iCloud configuration the sole conduit for data preservation. Furthermore, if a significant amount of time passed between your last play session and uninstallation, it is possible the local data on your device had already diverged from a much older cloud save, though the game generally attempts frequent background updates.

Should you encounter a scenario where progress is not restored, the recourse is limited as PopCap does not maintain independent servers for manual profile recovery for this title. Your only actionable step is to verify that iCloud Drive is enabled for PvZ 2 within your iOS Settings under your Apple ID profile, then reinstall the game once more to see if the correct save is detected. Prevention for future sessions involves manually triggering a save by visiting the game's map screen and ensuring a stable internet connection is active before exiting, which forces an upload. While the architecture is designed for robustness, its dependency on a single, user-managed service without a fallback means that any break in the chain—whether technical or behavioral—can result in permanent loss, a design trade-off for the simplicity of using the native iOS platform.