@Jessiestott91 I ran a test on the connection and I do not see any issues on the lines outside. Is the router connected to UNI D 1 port on the NTD?
Below are the NBN FTTP set up guide, can you please if everything is connected as recommended and the light status of both NTD and router.
It appears that the signal is present however, we need to configure the router with your TPG username & password.
The assigned Engineer has tried contacting you today to no avail.
I'll request for them to contact you again to assist you with the router configuration.