Not showing Attributes top, bottom

[anvar0522]

       ChatNetworkService.uploadMessage(page: 0) { [weak self] (result) in
            guard let self = self else { return }
            switch result {
            case .success(let data):
                data.list?.forEach({ chat in
                    if chat.mine == false {
                        self.selfSender = Sender(photoURL: "",
                                                 senderId: "0",
                                                 displayName: chat.clientName ?? "")
                    } else {
                        self.selfSender = Sender(photoURL: "",
                                                 senderId: chat.clientID ?? "",
                                                 displayName: chat.clientName ?? "")
                    }
                    let att = NSAttributedString(string: chat.message ?? "")
                    print(self.selfSender)
                    self.messages.append(Message(sender: self.selfSender,
                                                 messageId: chat.id?.description ?? "",
                                                 sentDate: Date(),
                                                 kind: .attributedText(att)))
                })
                DispatchQueue.main.async {
                    self.messagesCollectionView.reloadData()
                }
                print("success")
            case .failure(let error):
                switch error {
                case .standard(_, let model):
                    print("Standard")
                case .technical(let title, let description):
                    print("HELLO WORLD TECHNICAL \(title) \(description) ")
                case .unexpected(let description, _, _):
                    print("HELLO WORLD UNEXPECTED \(description) ")
                default:
                    break
                }
            }
        }

I have this code for appending data to message I have a layout like this:

func cellTopLabelHeight(for message: MessageType, at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> CGFloat {
20
}

func cellTopLabelAttributedText(for message: MessageType, at indexPath: IndexPath) -> NSAttributedString? {
    return NSAttributedString(string: message.sender.displayName)
}

if I am writing this code its showing display name but not like on cell example, screenshot above:

last version of MessageKit
Xcode version: 14.2