How Do You Uninstall a Software Update on Android?

What happens when you uninstall updates on Android?

Uninstalling updates take the app back to factory settings without having to do a complete factory reset. Factory resets are always the last resort. Clearing the cache, clearing data and rolling back updated on pre-installed apps can help avoid that.

Does uninstalling updates delete data?

Uninstalling updates to a system app does clear the data, tested by uninstalling a system app with data and observing the storage consumed by the data portion of the app go to 0.00B . For reference, it also outputs intents broadcasting android.