White label multi apps from single project

Best Practices

I have multiple clients wanting white label apps for the app.

I don't think we can do scalable way from flutterflow

I saw we can use codemagic, but don't know how
They ask for .env file variable, but I have client_id setup from app state

How do I connect them both?

Has anyone successfully made whitelabel apps? Are there other scalable ways to do?

3