Microsoft is automatically installing the WebView2 control on Windows 10 machines to support upcoming versions of Microsoft 365 and Microsoft Office applications. Microsoft announced in February that future versions of the Microsoft 365 would begin to utilize WebView 2 control to embed web content directly in the native applications. The control is built upon Microsoft’s new Chromium-based Edge browser. Microsoft originally stated that the Web View2 control would only be installed on Windows machines running Microsoft 365 version 2101. However, BleepingComputer has seen it also installed for non-subscription Microsoft Office versions, including Microsoft Office Professional 2019 and Office 2016.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-is-auto-installing-the-windows-10-webview2-runtime/