Yes, you using an APK from 2022 (Messenger) or 2023 (Lite). But treat it as a temporary solution. The app will degrade over time, and security risks are real. For daily reliable messaging, consider upgrading your device or switching to Telegram X (still supports Android 5.1) or Signal (older versions).
and similar builds from mid-2017 are explicitly verified to support Android 5.1+ (API 22) You can find these archived versions on platforms like Messenger Lite (Legacy): Messenger Lite is officially no longer operational, legacy versions like 51.0.1.12.216 were originally built to support Android 2.3 and higher Messenger Apk Android 5.1