First of all, I sympathize with this encounter. At present, the domestic technology can only rely on tissue recovery according to the doctor's advice, but the basic arch of the foot has been destroyed after such a big trauma, and it is hard to say whether the tendon function can be restored after reconstruction surgery. Skin can be transplanted for plastic surgery, but the recovery degree of subcutaneous tissue and muscle varies with individual physique. Maybe there is a miracle, it will grow well.

There is a cryosurgery technique in Europe, which puts the fuzzy broken foot in tissue culture solution to isolate the damaged tissue from the normal tissue at ultra-low temperature and accelerate the growth of granulation in the damaged tissue, but presumably your friend may not be able to go abroad for treatment.

I can only pray that her tissues and cells are strong, and maybe she can keep this foot.

Finally, if the worst happens, artificial limbs can be installed to assist life. The most important thing is the recovery of psychological trauma, which is more painful than flesh and blood.