The tutorial suggests using App.js but this is missing when creating a project? about react-native-paper

[Max-Lovell]

Thanks, that put me on the right track. What I've found on this for anyone else confused:

Docs for Paper UI (and I think every UI library suggested by Expo) are not updated with the newest version of Expo, which now uses the Expo file-based routing system by default. This means that the entry point to the app, App.tsx, is largely replaced with _layout.tsx (relevant PR), but also index.tsx to some degree. Fortunately, you can still mostly follow the tutorials, noting things like need to be inside RootLayout() in _layout.tsx instead of in App.tsx. A useful way to figure out the new system is to compare the Stack Navigator tutorials from the Expo docs and Paper.

Alternatively, you can create an app with App.tsx still using npx create-expo-app@latest ProjectName --template blank@latest (see), or could create-expo-app with a lower SDK.

[jcubic]

It looks like latest create-expo-app use new expo router and don't use any old files.

I'm not familiar with new router (it looks like file based like in Next.js), but I would say that the documentation needs to be updated to include information how to use library with new base expo project.