Does UE4 support Active Ragdoll?

https://docs.unrealengine.com/en-US/InteractiveExperiences/Physics/ChaosPhysics/Overview/index.html
is this doc the latest?
I checked UE4Editor.Target.cs either in the installed 4.26.2 dir or the latest code dir from github, both of them are with not enable Chaos:
// Copyright Epic Games, Inc. All Rights Reserved.

using UnrealBuildTool;

using System.Collections.Generic;

public class UE4EditorTarget : TargetRules

{

public UE4EditorTarget( TargetInfo Target ) : base(Target)

{

    Type = TargetType.Editor;

    BuildEnvironment = TargetBuildEnvironment.Shared;

    bBuildAllModules = true;

    ExtraModuleNames.Add("UE4Game");

}

}

without:

    bCompileChaos = true; 
    //Note that the following line is not needed for 4.23 or previous versions. 
    bUseChaos = true; 

so it means both of the 4.26.2 from installer or github code are still use PhysX ?