Facebook Messenger no longer supports Android 4.4.2 (KitKat) — the last compatible versions were from around 2019–2020 (e.g., Messenger v248 or earlier). The Play Store will show "incompatible" for newer devices.
Android 4.4.2 KitKat was a revolutionary mobile operating system. It brought smooth performance to millions of budget devices worldwide. Today, keeping legacy KitKat smartphones functional is a challenge. Modern apps require newer Android versions to run. Fortunately, you can still use Facebook Messenger on your Android 4.4.2 device by downloading the correct APK file. facebook messenger apk for android 4.4 2 free download