Some users utilize desktop software like iMazing to manage app versions, though this requires technical knowledge and previous backups. Critical Safety Precautions

Ensure you pick the version that matches your device (arm64-v8a vs. armeabi-v7a). If unsure, "universal" builds are safest.

Once you install an old version, go to the Play Store settings and turn off "Auto-update apps." Otherwise, your phone will overwrite your old version with the new one overnight. The Better Alternative: Facebook Lite