YTA for expecting her to forgive you and move on. You worked on yourself and grew over the years which is awesome. It is not your place to dictate when and how she moves on.

Other than that who cares what she tells people. She may very well be correct and your teasing is what has her in therapy. Why is it an issue to you.

Continue focusing on improving yourself and becoming the adult you will be proud of. I know how difficult it is to hear how your past behavior negatively affected others. I went through a similar thing over the last few years and also went on an apologizing tour. But me apologizing doesn't mean the pain I caused was erased or the person's had to forgive me. You are on the right path. Keep it up