App Storeのアプリページに遷移して、レビュー画面を表示

guard let writeReviewURL = URL(string: "https://apps.apple.com/app/idXXXXXXXXXX?action=write-review") else {
    fatalError("Expected a valid URL")
}
UIApplication.shared.open(writeReviewURL, options: [:], completionHandler: nil)