What is the current way to implement P2P on PS4 using Unity?

Previously we released a game which used the NPToolkit for matchmaking and then UNET LLAPI to use the peer ip/ports discovered from NP.
ie. NetworkTransport.ConnectEndPoint(), NetworkTransport.Send()
However,NetworkTransport warns it is obsolete and will be removed
None of the Unity PS4 P2P samples seem to be currently valid as they both use the obsolete HLAPI

Also, does using NetworkTransport on PS4 fall back to a relay, if so will our older released game will lose function right?

 

You're probably going to be told to ask the question in a PS4 specific forum, because NDA's forbid discussing developing for the PS4 in an open forum.