Officially, WhatsApp stopped supporting Nokia's S40 (Series 40) and Symbian platforms from December 2018. This means that officially, there's no WhatsApp version directly supported on Nokia 220 (which runs on Nokia OS, based on Series 40).
WhatsApp VXP is a customized version of WhatsApp that is designed to run on non-smartphone devices, including feature phones like the Nokia 220. It's a third-party modification that allows users to access WhatsApp on devices that don't support the official WhatsApp app.
Here's what I found: