let reducer = Reducer { state, action, env in
    switch state {
        case .onAppear:
            for link in links {
                env.downloadFromLink(link)
                    .receive(on: env.mainQueue())
                    .catchToEffect()
                    // What's next???
                    ...
            }
        case .infoDownloaded:
            // do sth from data from link
    }
}

func downloadFromLink(url: URL) -> Effect<SomeData, APIError> {
    return URLSession.shared.dataTaskPublisher(for: url)
        .mapError { _ in APIError.downloadError }
        .retry(3)
        .map { data, _ in data }
        .decode(type: SomeData.self, decoder: JSONDecoder())
        .mapError { _ in APIError.decodingError }
        .eraseToEffect()
}