Add component to details panel & Runtime

Snippet to add a component at runtime and see it in detail panel
Thanks Northstar for sharing.

UActorComponent* UCyComponentLibrary::AddRuntimeInstanceComponent(AActor* Actor, TSubclassOf<UActorComponent> ComponentClass) 
{
	if (!IsValid(Actor) || !IsValid(ComponentClass)) { return nullptr; }
	
	EObjectFlags Flags = RF_Transient;
	Flags &= ~RF_Transactional;
	
	UActorComponent* NewComponent = NewObject<UActorComponent>(Actor, ComponentClass, NAME_None, Flags);
	if (!IsValid(NewComponent)) { return nullptr; }
	
	NewComponent->RegisterComponent();
	Actor->AddInstanceComponent(NewComponent);
	
	return NewComponent;
}

**Template version

template<class T>  
T* AddRuntimeInstanceComponent(AActor* Actor, TSubclassOf<T> ComponentClass)
{  
    if (!IsValid(Actor) || !IsValid(ComponentClass)) { return nullptr; }  
  
    EObjectFlags Flags = RF_Transient;  
    Flags &= ~RF_Transactional;  
  
    T* NewComponent = NewObject<T>(Actor, ComponentClass, NAME_None, Flags);  
    if (!IsValid(NewComponent)) { return nullptr; }  
  
    NewComponent->RegisterComponent();  
    Actor->AddInstanceComponent(NewComponent);  
  
    return NewComponent;  
}

Never tested
Can be needed when dynamically spawning components

FKismetEditorUtilities::AddComponentsToBlueprint

For scene components when you attach them and register, there is only two ways

1. Use SetupAttachement then RegisterComponent
2. Use RegisterComponent then AttachTo