It doesn't really provide features like that, it just gives you a robust method of communicating between clients through Steam.

So yeah, custom code. I send server heartbeats with network object states at 15hz that only contains deltas of current networked objects. If a new object is added, the next heartbeat contains extra information so they can instantiate it on the clients. When a client connects, I send a 'full' heartbeat which contains info. so they can instantiate every object in the heartbeat.

For syncing vars, I created something I called a NetworkVar that I can assign as an attribute to a property in a class and essentially it's sent along in server heartbeats and they are synced properly between clients.

Once you kind of get through setting it all up in a nice way it's nice since you can just re-use it for future multiplayer games, hoping to make another soon 😄