La versión oficial de Facebook (la azul pesada) requiere Android 8.0 o superior. Por lo tanto, para Android 4.4.2, la es Facebook Lite.
Facebook’s official app no longer supports Android 4.4.2. The last compatible version is Facebook Lite or an older "Espacio" APK from 2019–2020. You cannot install the full modern Facebook app on 4.4.2.
First, it often refers to modified versions of the app, such as "Facebook Lite" or custom mods developed by third-party communities (often found on sites like APKMirror or specialized Android forums). These versions are sometimes advertised as taking up less "espacio" (storage space) or requiring less RAM, making them suitable for older devices running KitKat. Users search for this hoping to find a streamlined version of the app that will not crash their aging phone.
Como Google Play Store ha retirado el soporte para muchos servicios en Android 4.4, es probable que debas instalar el archivo APK manualmente siguiendo estos pasos: Bitdefender