If you cannot get the app to work, the mobile website () is the most reliable way to access the platform on devices running iOS 12 or older. You can "Add to Home Screen" from Safari to make it feel like a standard app.
Subreddits like r/LegacyJailbreak are goldmines for finding links to verified archives of older software. How to Install an Old IPA on Your iPhone facebook old version ipa
Note: Apps installed this way usually need to be refreshed every 7 days unless you have a developer account. Method 2: AppSync Unified (Jailbreak Required) If you cannot get the app to work,
If you decide to proceed with the old IPA, use Sideloadly, verify your file sources, and always have a backup of your data. Happy retro social networking. verify your file sources