Online Multiplayer Game

Hello there…
I want to know about making online multiplayer game using UE4,
I’m familiar with Socket.io and know that it’s a perfect way to make live chat room and multiplayer games,
so I tested socket.io communication between c++ and Node.js server and is perfect, and I have found socket.io component inside UE4.
I’ve experienced about making multiplayer game using UE4+Blueprint (UE4 Video tutorials)…on Lan and internet under network sub system!
but my problem is that I want to have real server like paragon and …, not a client device as server,
and now my goal is to integrate all these experiences to make a real online mutiplayer game…
because UE4 multiplayer mechanism is perfect and it makes it easy and socket.io is a perfect way to making live multiplayer game…
so I want to find a tutorial or source or start way or description about my goal!
if ue4 is not using socket.io, so I want to know about UE4 online protocols and server mechanism to having online realtime game…
can I run it on my server or it’s better to run on steam or …
another thing is about controlling replication of items on open world games so I don’t know how UE4 can control it,is it automatic or I must control it manually…because I think in OW game, it’s not needed to replicate all of items for all users, just is required partial replication,am I right?
thanks a lot…

the best way seems to be using UE4 Dedicated server export which manages all rooms and clients and hides many complexity because 3d games are so complicated for replications (physics and …).
but I think we can use Socket.IO for simple games without complicate actors and physics and …