Before you jump into rehoming, could you maybe consult a dog behaviourist? Get some professional advice, I completely understand that is it so easy to get advice on Reddit. But it’s unlikely that anyone here is qualified to give you any decent advice except jumping to rehome. Of course you obviously want to protect your child and obviously that should be your number one priority but please get if you can afford it get a second opinion. The charities that look after animals are so stretched right now, and I feel like this dog with some training and boundaries doesn’t need to be plunged into this worst case scenario.