https://wccftech.com/upcoming-whatsapp-update-to-drop-support-for-ios-10-and-ios-11-these-iphone-models-will-be-affected/

WhatsApp is one of the world's leading internet messaging apps for iOS and Android. The company is introducing a wide variety of new forward-facing features like Reactions and there are a lot more in the pipeline. A future WhatsApp update will see fit to drop support for Apple's iOS 10 and iOS 11 operating systems for iPhone. What this means is that the builds will no longer receive updates from the platform. Scroll down to read more details on which iPhone models will be affected by the change.

As mentioned earlier, WhatsApp is planning to drop support for iPhone models running iOS 10 and iOS 11 (via WABetaInfo). The internet messaging platform will no longer work on these firmware builds and the company urges users to download the latest build available.