Game Instance Subsystem Not found

in both UE_5.1.1 and UE_5.2.1 I have a subsystem that is child of UGameInstanceSubsystem. that will need a UDataTable assigned to it. I was hoping to do it through the plugin, but it does not appear in the browser to avoid hard references.

the Browser does show the child of UTickableWorldSubsystem that I created, and it is performing as expected.

steps to reproduce:

in project "SubSTest" as C++ project
added SubsystemBrowserPlugin to Plugins folder in project Root
had to modify in accordance with Issue#9: in SubsystemBrowserUtils.cpp comment out // ADD_FLAG(CLASS_NoExport); // ADD_FLAG(CLASS_CustomConstructor);
opened project by Compile and Run
created UGISubTest as derived from UGameInstanceSubsystem
gave UGISubTest required code

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Subsystems/GameInstanceSubsystem.h"
#include "GISubTest.generated.h"

/**
 * 
 */
UCLASS()
class SUBSTEST_API UGISubTest : public UGameInstanceSubsystem
{
    GENERATED_BODY()
public:
    // Begin Subsystem Required
    virtual void Initialize(FSubsystemCollectionBase& Collection) override
    {
        Super::Initialize(Collection);
    }
    virtual void Deinitialize() override
    {
        Super::Deinitialize();
    }
    // End Subsystem Required

    UFUNCTION(BlueprintCallable)
    void TestFunction()
    {
        UE_LOG(LogTemp, Error, TEXT("Subsystem Was created"));
    }
};

compiled and ran (no errors)
opened Window-> Subsystem
scrolled down to GameInstanceSubsystems (index has no children)
blueprint able to place "Get GISubTest" and call "TestFunction()"

expected behavior there should be an entry for GISubTest (even if it has no members)

aquanox / SubsystemBrowserPlugin

Game Instance Subsystem Not found #10