Dear Ginak,
It is completly normal that after 7 week, the strenght is almost gone, as the propioception and coordination.

First this, you should ask the doctor how much she can load the foot, so that u dont go to fast...he will give u a % of the total weight, for example 25%. Then u can calculate this from the weight of you daughter and train with a weight.

I would anyway highly recomend u to visit a physio asap, so you can get advices of how to walk, and start loading.

Good luck!