I think it depends also of you initial setup, how you start and what version your are using. If you are using CMP, the context can be injected directly without initialization (Koin do it under the hood for you). If you are only in android application and start koin in the application class, you may need to initialize it yourself by calling androidContext.
https://insert-koin.io/docs/reference/koin-android/start. Not sure if the doc is up to date about that. Best way, try to inject it, if it fail saying Context doesn't exist, provide it yourself in your setup.