Worona creates a native app and an HTML5 web app that are independent from your WordPress theme. We use the WordPress REST API to take the content from your WordPress and we display it in a client-side rendered app.
We are not wrapping your site inside a webview, this won’t make it perform better on mobile devices. This is why we can’t take your server-side-rendered theme and display it automatically inside the app. In any case, we encourage you to develop your own themes or ask your theme designer to port your WordPress theme to Worona.