Completely unsupported. You cannot download it from the Google Play Store, and existing installations will eventually stop connecting to servers.
If you are still using a device running Android 4.4.2, here is a detailed breakdown of the current situation, why the change happened, and what your options are. whatsapp for android 4.4.2
On September 8, 2026 , the minimum requirement will jump again to Android 6.0 (Marshmallow) . Why Support for Android 4.4.2 Ended Completely unsupported