The company has confirmed that WinUI 3 and the Windows App SDK is on the path to become open-source, but that there's lots of work to be done first before that can happen.

This native approach gave the app a performance edge over the web-based version. Now, Meta is returning to WebView2, the Edge framework that wraps apps around the Windows native browser component.

The WhatsApp App or Windows gets a new beta update where the brand has switched the framework from native Windows to Web version.