Hi @homebox ,
Welcome to Community,
We only support devices that are suppiled by TPG but you can check this link below which may help you,
Welcome to the Community!
If you are under the NBN BYO plan, then it should work by using the correct PPPoE settings.
If you are under the first NBN plan that we provide, then it means that the router that you've purchased needs to have a VLAN ID settings for it to work with your NBN HFC service.
Let us know if you need further assistance.