I am showing facebook page feed in mobile using facebook page plugins application it work fine in android but not in ios

Question

I am using webview to display facebook page in an application. It only shows the small screen in the corner. I am unable to set the width and height of it on

<WebView
        originWhitelist={['*']}
        source={{html: '<iframe src="https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fsitrccomp%2F&tabs=timeline&width=340&height=500&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true&appId=1279706002103925" width="340" height="500" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true" allow="encrypted-media"></iframe>'}}
      />

the mobile screen.