Your games will likely want to react to people joining and leaving the game. To help with this you can implement Component.INetworkListener or Component.INetworkSpawn on a component and place it in the scene.

Example

Here's an example, where on joining the game a player object is created and the incoming player is assigned as the owner.

public sealed class GameNetworkManager : Component, Component.INetworkListener
{
	[Property] public GameObject PlayerPrefab { get; set; }
	[Property] public GameObject SpawnPoint { get; set; }

	/// <summary>
	/// Called on the host when someone successfully joins the server (including the local player)
	/// </summary>
	public void OnActive( Connection connection )
	{
		// Spawn a player for this client
		var player = PlayerPrefab.Clone( SpawnPoint.Transform.World );

		// Find the NameTag component and set their name correctly
		var nameTag = player.Components.Get<NameTagPanel>( FindMode.EverythingInSelfAndDescendants );
		if ( nameTag is not null )
		{
			nameTag.Name = connection.DisplayName;
		}

		// Spawn it on the network, assign connection as the owner
		player.NetworkSpawn( connection );
	}
}

INetworkListener

The interface INetworkListener has multiple methods that you can optionally override.

INetworkSpawn

The interface INetworkSpawn has a method to react to objects spawning on the network.