Wow, that was a really drastic step. For future reference, all you had to do was tap "Uninstall" in Google Maps in the Play Store. That would uninstall all updates to the app, leaving it in its original state.

The trouble with reverting to factory default is that you get the version of Maps that was the most recent one when the tablet was made, including whatever bugs and less-capable features were current at the time. If you download the latest pre-redesign version, you can install it using the Files app. Check the box next toSystem settings / Security & Screen Lock / Unknown sources, then find the downloaded file and long-tap it to install it.