Just become a woman is frum, doesn’t mean she will take good care of your child(ren). Please look at a woman’s qualifications, not her religious status.
We use a non-Jewish daycare that has a ton of frum kids. They are very respectful of only feeding the kids food you bring (or on occasion, foods with a proper hechsher that they talk to you about before). They are warm, loving and teach the kids a ton.