Maybe someone else needs this.
Your syntax should look like this:
const AActor * parent = GetOwner();
TArray MyArrowComponentArray2 = parent->GetComponentsByTag(UArrowComponent::StaticClass(), FName(“Arrow”));
for (UActorComponent * it : MyArrowComponentArray2)
{
Name = it->GetName();
UE_LOG(LogTemp, Warning, TEXT(“ARROW Name : %s”), *Name);
}