Hi, I Had ATFL Surgery 8 Weeks Ago And Have

Hi, I had ATFL surgery 8 weeks ago and have started physio. My physio does seem surprised that I cannot raise to ball (combination of strength & pain). I can do heel raises on both feet but as soon as I take the good foot away to lower on the bad foot, I have mass pain through the ankle and down through the foot. Is it just weakness causing this.