Welcome to the Community!
Your address was tagged by NBNCo as Service Class 31 which means that FTTC infrastructure from the pit going to your premises has not been laid out yet. This means that NBNCo has to send a technician out and install all the necessary infrastructure, including bringing the NCD (network connection device) and installing it at your premises.
You will be notified of the installation appointment via email and/or SMS. At this stage, we're waiting for NBNCo to provide us a schedule.