What will be changed if prebuild in React Native Expo Poject?

Question

I want to use react-native-fbsdk-next in Expo project (Expo SDK 46)

https://github.com/thebergamo/react-native-fbsdk-next

The package doesn't support expo install, so I have to use npx expo prebuild to release iOS and Android folder.

But as the doc says:

https://docs.expo.dev/workflow/customizing/

Your app can still run in Expo Go, however, any custom native code won't be accessible if it's not already present in the Expo Go app.

So I guess it still can type expo start to run the app, but my question is:

1. Is it still can publish the app by eas build ?
2. If I release Android and iOS folder manage by myself, is it still can use expo upgrade to upgrade the Expo SDK ?