Best way to pass data from backend c++

[Nio74]

Hi, I need to link the data from the classes connected to the backend, for example I have this class where it receives the data from the server through this method:

void ClientServices::readyRead()
{
   QDataStream in(tcpSocket);//QtcpSocket
 
    int code = 0;
    double pCost = 0;
    double pPublic = 0;
 
    in >> code >> pCost >> pPublic;
 
    qDebug() << code << pCost << pPublic;
 
 
}

void ClientServices::readyRead()
{
   QDataStream in(tcpSocket);//QtcpSocket

    int code = 0;
    double pCost = 0;
    double pPublic = 0;

    in >> code >> pCost >> pPublic;

    qDebug() << code << pCost << pPublic;


}

To copy to clipboard, switch view to plain text mode 

the Backend is declare in this mode:

qmlRegisterType<Backend>("io.qt.Backend", 1, 0, "Backend");

can I do?

I think to do with the Q_Property but but I wouldn't go for the backend anymore. In practice I have to fill in text boxes with variable :

code >> pCost >> pPublic;

see my schema:
Property.jpg