Creating Online Game as a RPG Genre

I’m not sure if this is the right category to use but the game that I am developing with a RPG Genre to make it online. The only thing I’m unsure about is how the engine will handle it. Has anyone ever done this before and if so was it successful? Thanks.

I was working on one of those in unity but I am new to unreal I believe that it should work with ps4/ xbox if you build it. I am looking for someone to make some games with that has experience with unreal I have some good ideas.

Yes, online RPGs have been written in Unreal.
Even online massive RPGs and massive FPSes have been written in Unreal.
The built-in networking in Unreal can probably be used for an online RPG (like Diablo or Neverwinter Nights.)
For the “MMO” bit, you’ll probably end up changing the networking to something more tuned to that kind of gameplay, as the resource consumption on servers would be pretty high otherwise.

Thank you.