If you have the fibre internet with a Network Access Hub model "Technicolor NH20T", a TP Link router that you want to use as a wifi access point, and your Telus technician gave you a Telus Wifi Boost 6 device that you want to extend that same wifi SSID (mesh network), here's how you can do it:
You CANNOT connect the Boost 6 directly to the NAH via MoCA because, as far as I can tell, the NAH (Technicolor NH20T) admin portal provides no way to put it into "bridged mode". You instead need to connect the Boost 6 via your house's pre-existing coax cables to your TP Link router via a separate MoCA adapter. Telus can provide these, the technician may have left you one or more when they installed your fibre, otherwise you can buy them cheap online.
Finally, go to your TP Link admin portal -> Network Map -> Mesh Devices, and it should already be working, you should see it in the list of mesh devices Boost 6 (it may be listed as a "Boost2").
See this example network diagram for what a successful setup might look like:
