Most Facebook Lite versions maintain support for Android 5.0 and 5.1. Facebook (Android 5.1+) APKs - APKMirror
For a successful installation on Android 5.1 (API 22), the APK must meet specific architecture and DPI requirements: Android 5.1+ (Lollipop MR1). Architecture: Most commonly armeabi-v7a . facebook para android 5.1 9 apk
Go to Settings > Security and toggle on "Unknown Sources" to allow installs from outside the Play Store. Most Facebook Lite versions maintain support for Android 5
Visit a trusted repository like APKMirror or Uptodown to find a version compatible with Android 5.1+. facebook para android 5.1 9 apk