Here's an example repo for a react-native app using oauth. For mobile platforms, you need to have platform-specific redirect URIs.
Additionally, you'll need to have a live deployment of your oauth-client-metadata file on your app's domain
github.com/bluesky-soci...
github.com
cookbook/react-native-oauth at main · bluesky-social/cookbook
A collection of example projects and scripts for atproto development. - bluesky-social/cookbook