Welcome to the Community!
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We've created an article that will guide you on how to track your service installation. Refer to this link: Check or Reschedule Your TPG Installation via tpg.com.au/install
Once you receive a notification about your TPG FTTB installation, you may refer to this article for the setup guide.(TPG Fibre To The Building (TPG FTTB) Setup Guide)
Let us know how it goes.