While you may find third-party sites offering a "patched" version of Facebook for older Android devices, downloading such files carries significant security risks. Official versions of the Facebook app generally require or higher to run safely and receive security updates. Risks of Patched or Third-Party APKs
Facebook constantly forces users to update to the latest version. A patched APK allows users to stay on a stable, older version without constant, annoying update prompts. facebook app for android 236 free download patched