The key is "webview", so ignore the "react-native" part and insert "capacitor" or "ionic".

React-native doesn't let you easily reuse your webstack to build it. It's not a web view but a way to create a javascript controlled runtime for a native interface. In my experience it's a rewrite and every effort to share components between react-native and react-web hasn't panned out well.

My "app" inside the webview is html+css and 2 lines of js here and there, so if that works, anything you like will work