Certainly most Christian groups would not be shocked by the idea of a continuous miracle of “soul-creation” with each birth. But this is only necessary if someone is keen on Original Sin being a viable form of metaphysics. And so there would certainly be a distinct predisposition for anyone who holds to Original Sin to also believing God miraculously produces souls.
At the end of the day, don’t most Christians think God has already created souls, maybe from the dawn of creation, which he unites with biological bodies as he so desires?