Terrible for her. The only piece of advice I'll offer, is don't think that by working harder you'll get back sooner. Follow the normal time and normal process, and focus on leg strength, then on agility. Very often athletes, even a year out from ACL reconstruction, have measurable quad deficiencies in bulk, twitch quickness, reaction time ... and this is particularly true with female athletes, who do not (on average) have the same starting quad to hamstring strength ratios as the guys. Also, as depressing as this is, there's a roughly 30% risk of either re-tearing this ACL or tearing the ACL in the other knee for female athletes at this age and level of sport.
Take your time, be absolutely sure the knee is ready, and both legs are strong. Then come back.