@sb11011989 . You can try putting the VR1600 into bridge mode.
Basically, delete the VLAN 2 connection and add a new VLAN 2 connection in Bridge mode.
The Netgear is setup as PPPoE with TPG username and password. Connect its WAN port to VR1600 LAN port.
This iiNet article is a list of routers for FTTN. They are VDSL2 routers with RJ11 DSL port. The list is dated so these models may not have Wifi6.
You can check online for wifi6 routers with a DSL port.
@sb11011989 . If you check the specifications, it is only Wifi5 and only has WPA2 wifi security.
Unless the current docmentation you have specifies it has wifi6. Latest wifi security is WPA3.
Anyhow, I can't recommend specific models.