I am happy you and your daughter can now walk arm in arm. That's awesome.

Sometimes, pleple heal on their own. I am not a doctor, but your daughter's body apparently needed some development to occur before she could walk. There is some rational explanation for your daughter walking now when she couldn't before. We (you or your daughter) may never find out what it was that transpired to enable her to walk one day. But, just because you don't know or never may know, it doesn't mean that God did it. I am happy for you and your daughter no matter what the reason is that she can now walk.

Having said the above, religion claims that God answers prayers. He does not. You haven't falsified my claim with your prayer being answered by some mechanism as I claim it definitely was not God.