5 weeks post op ACLR Update!

Hi! I’m 5 weeks post op (ACLR - Hamstring graft + Partial LM Trim). I had full extension since day 1 passive but I don’t have this actively (when walking etc). Also as I started focussing more on flexion (95deg unassisted and ~105-110deg assisted), I feel I lose the extension a bit. As I focus on extension exs, flexion doesnt remain as good. I can’t go from max flexion to full extension in one motion currently (I get pain on the lateral side which IDK goes a bit down to my shin/ankle as well). So I do them separately and try to go as far as possible. My physio thinks not to worry too much so early on but wants me to reach 120+ flexion while maintaining the full extension in 2 weeks, but this kind of seems too tough esp with the pain that comes with it as if I can’t go any further than this. Just wanted to know how should I go about this esp the pain. Is it concerning? Should I push myself more? One more thing is I find heel slides to be harder than letting my operated leg hang and then push it backwards with the other leg (I kinda get more flexion doing this, but heel slides give me that lateral pain). Have been working on quad activation/strengthening (BFR etc) a bit as well in case that might help get rid of this. Would love to hear yall thoughts or if someone had been in a similar position like mine.