WhatsApp disabled the authentication and communication servers for Windows Phone shortly after support ended. Even if you successfully install the file, the app will fail to register or sync messages.
The Windows Phone Archive contains various versions of the app for historical documentation. download whatsapp xap file for windows phone
For collectors or developers interested in the legacy software for research, .xap files are hosted on community-driven archives: download whatsapp xap file for windows phone
Official support for WhatsApp on Windows Phone operating systems ended on . While you can still find legacy .xap files for archival purposes, the app will no longer connect to WhatsApp servers, making it non-functional for messaging on these devices. The Current State of WhatsApp on Windows Phone download whatsapp xap file for windows phone