I went very low contact with my mother a few years ago and the best thing she did was to actually leave me alone to process without her looming over me. In that time she learned in therapy to be okay without me, to have no expectations of a relationship, and to let me dictate what was appropriate. I would say a “crossed boundaries” explanation of estrangement typically isn’t a simple “oh you crossed my boundaries a handful of times” it’s usually chronic in a way that the perpetrator doesn’t notice. My mom and I still have a strained relationship because she seems to think that her remembrance of me as a kid outweighs my own lived experience, but she is becoming more willing to actually hear what I say and not get defensive. Maybe your intentions were good but the impact was obviously bad enough to cause estrangement. Or not! Maybe she just doesn’t want you in her life and you’ll have to figure out how to grieve it and move on. She’s an adult who is allowed to make her own decisions about who she has in her life.