Although the game is no more available in Playstore as the developers remove the old games from the Playstore as soon as they release a newer version.
But here you can directly Install the game directly from the Apk+Obb file.
Enable Unknown Sources: Before installing the game, go to your device’s Settings, navigate to Security or Privacy, and enable the option to install apps from Unknown Sources. This allows you to install apps from sources other than the Google Play Store.
Download the APK and OBB Files: Download the FIFA 12 Mobile Apk file and the corresponding OBB (data) file onto your device.
Install the APK: Locate the downloaded FIFA 12 Mobile Apk file and tap on it to start the installation process. Follow the on-screen instructions and grant any necessary permissions.
Move the OBB File: After the installation is complete, locate the OBB file in your device’s storage. Move the OBB file to the designated folder: “Android/OBB”. You can use ZArchiver App for this.
Enjoy the Game: Once the OBB file is placed in the correct folder, you can launch FIFA 12 Mobile.