Not able to get the webview context in Appium, only show Native context

In my iOS app , my page is developed in React Native and all widgets are also created in React Native but after click on any widgets or icon It will open webview.
I am not getting webview context in Appium , but when I build the page without React native code and open the webview then I am able to get the webview context.

appreciate if any one can help out