No woman with children would ever be able to leave an abusive partner.
You leave your abuser, and work out contact with the kids in a contact centre or in a neutral handover location, or not at all. It might go through court if he seeks access but it might not. You can still leave him and he has no right at all to know where you live, even if you have his kids living there.
With your idiotic idea, women wouldn’t be able to leave and keep themselves safe and he would always know where they were, until they were able to go to court and have his “rights to access the tracker” removed. But if you bring in tracking of children, then it would be a very very high bar to remove a parent’s right to access the device. I’d imagine very few victims of domestic abuse could prove it to a high enough standard that his right to track would be removed. So abusive men will always be able to track where their ex lives.
One thing that saves women’s lives is that parents actually have no legal right to know the home address of their child when they live with the other parent. Access handovers can be done anywhere, they have no legal right to know where the child lives. No one needs to prove abuse or danger.
You bring in tracking and that’s gone instantly. You’d have to prove you were in danger to remove his right to track - courts take months if not years so women would be in danger the entire time, and the burden to prove it would be so high that most couldn’t.
The most dangerous time for a woman in an abusive relationship is when she leaves. And she wouldn’t be able to leave and have his tracking rights removed in the same day.
Your idea will get women killed.