How to instantiate a C# scene from an external pck

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Godot Version

4.4.1

Question

I have a scenario where the root node has a C# script attached. After loading it from an external .pck file, I cannot instantiate it using PackedScene.Instantiate because the associated C# script class implementation does not exist in the external .pck package. Although I found a workaround to load this C# scene, since the code in this scene also loads other scenes, and those other scenes cannot be loaded either due to the C# code in the external .pck being empty implementations, this renders the entire scene unusable.

I instantiated the C# class by loading the assembly, but because it depends on child nodes, it also cannot be added to the tree as a standalone node.

		var path = OS.GetExecutablePath().GetBaseDir();
		var pckPath = path.PathJoin("mod.pck");
		var dllPath = path.PathJoin("mod.dll");

		var result = ProjectSettings.LoadResourcePack(pckPath);
		GD.Print("res load: ", result);

		var types = new List<Type>();
		Assembly assembly = null;
		try
		{
			assembly = AssemblyLoadContext.GetLoadContext(Assembly.GetExecutingAssembly())?.LoadFromAssemblyPath(dllPath);
		}
		catch (Exception e)
		{
			GD.Print(e);
			return;
		}
		try
		{			
			types = assembly.GetTypes().ToList();
		}
		catch (ReflectionTypeLoadException e)
		{		
			types = e.Types.Where(t => t != null).ToList();
			foreach (var type in types)
			{
				GD.Print(type.FullName);
			}			
		}
		var modClass = (Node)Activator.CreateInstance(types.First(t => t.FullName == "MyNamespace.MyMod"));

		var modScript = (CSharpScript)modClass.GetScript();		

		var node = ResourceLoader.Load<PackedScene>("res://MyMod/Mod.tscn").Instantiate();
		var nodeID = node.GetInstanceId();
		node.SetScript(modScript);
		node = (Node)GodotObject.InstanceFromId(nodeID);

		GetTree().Root.CallDeferred(Node.MethodName.AddChild, node);