Surely VDSL2 was designed to be used over UTP copper? As is G.Fast?
G.FAST is over very short distances I would think, or there would be no point.
Normally from the last chamber/phone pole before building, remember that CAT5e is about 100m if I recall for 1Gbps, which is why you need to be on FTTP to fully get the 1Gbps with G.FAST, unless you are using less than 16m of copper cable from the hardware in the chamber to your modem/router etc.
If we wasn't down for FTTP and we got G.FAST, the most we would get would be about 800 Mbps (up and down streams combined) due to we have about 60m of copper to our nearest chamber.
Paul