Customizing the UI of WebView2 apps
Customize the context menus of your WebView2 app
Use the ContextMenuRequested API to customize the context-menus (right-click menus) of your WebView2 app. Using this API, you can:
Add and remove items from the default WebView2 context menus.
Create your own context menu by using data that's passed from the WebView2 control to your app.