CreateDefaultSubobject On Particular Blueprint

Development Programming & Scripting C++
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I use multiple blueprint based on single Parent C++ class

343691-screenshot-2021-07-09-142557.jpg

But, Challenging is Create-Subobject or Impliment Changes on only particular blueprint

this is my .h file

protected:
    	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "theMovingPlatformObstacles") UTimelineComponent* MovingPlatformTimelineComponent;

& this .cpp class

if(myObstacle == Obstacles::None) ObstacleStaticMeshComponent = Cast<UStaticMeshComponent>(GetDefaultSubobjectByName(TEXT("Default_StaticMeshComponent")));
else if (myObstacle == Obstacles::MovingPlatform) { ObstacleStaticMeshComponent = Cast<UStaticMeshComponent>(GetDefaultSubobjectByName(TEXT("MovingPlatform_StaticMeshComponent")));
	MovingPlatformTimelineComponent = CreateDefaultSubobject<UTimelineComponent>(TEXT("MovingPlatformTimelineComponent")); }

But in Blueprint Component(UTimelineComponent) not created in any blueprint otherwise use method CreateDefaultSubobject without Enum() Impliment or Create in all Actor Blueprint
How I can Impliment On Particular Blueprint, If you have any idea please Answer