What I have learned through this forum is that it’s not exercise that gets ROM, it’s time. Time to to recover, time for pain and swelling to settle, and time to heal. Our ROM is right there all along just waiting for that to happen. “Our part” is giving our knee the best opportunity to heal, and doing lots of exercises this early is counterproductive to that. Many of us are told we must do exercises in order to improve, but that is not true. Yes we need to move the knee gently to help regain motion. Your therapist nor your doctor are “responsible “ for where your ROM is. That is determined by the way your particular body heals. They may want a certain number and even by a certain date, but they can’t control that. They can, however, influence it for negative by insisting you do too much that will keep your knee swollen which reduces ROM. There are many approaches to recovery/rehab which tells me there is no one way to do it, so we get to choose which one suits our body best. It’s your knee, your choice.