Running older, unsupported versions of the app (via APKs) is risky, as they do not receive critical security patches. WhatsApp Help Center Options for Android 4.4.2 Users
: While some third-party sites like APKMirror or Uptodown host older APK versions (such as version 2.23.4.4) that technically supported Android 4.1+, these versions are often "expired" and will prompt you to update to a version your OS cannot run. Review of Key Features whatsapp business para android 44 2