I have successfully setup Google Wifi with NBN HFC and the TP-Link Archer 1600V router as below:
In the router settings:
Advanced > Network > DSL > Add...
Modulation Type: VDSL
VLAN ID: Disabled
Internet Connection Type: Bridge
The bridge was then displayed on the Network > Interface Grouping as LAN1 port. I connected the Google WiFI to the LAN1 port on the Archer router and continued to successfuly setup the Google Wifi via the Google Home app. I then disabled the WiFi radio no the Archer modem and all is working peachy (and MUCH faster than the Archer!)