Generally if the NTD FTTC NCD (Network Connection Device) has not been shipped it will be installed by the NBN tech.
We did an article that you may find helpful, this will guide you on how to track your NBN service installation. How to track your TPG service installation
Once the NBN service installation is complete you may proceed on setting up the equipment or the modem/router. You may check this guide.
Should you need further assistance, feel free to reply to this message or chat with us at https://www.tpg.com.au/support/contact/ and we'd be glad to assist you.