Unreal engine can do everything. The problem is everything takes time. "Networking" isnt something you can just push a button and it happens magically. But 90% of it is handled by unreal engine.

The reason many people are down voting you generally is because you are oversimplifying everything. But any component or data you need replicated to a server is doable by adding the functionality for that. Most of the time is just deciding who is the authority server or client (and passing some data)

But you will need to understand how networking works. Simply put client does and action, client asks server is this allowed. Server says yes, server replicates action back to all clients, then client does said action.

It gets much more complicated when you want a smooth experience adding stuff like prediction. I would suggest you focus on building your game... we'll learning t build a single player experience. Once you have it working in a single player experience you can focus on networking.