This is so shit man. I'm going to share my experiences with my bio mother in solidarity and share whats been helpful for me, and I hope you find some comfort or something useful in what I share.
Long story short mother disowned me to avoid accepting I'm trans. It hurt. Life is so much better without her now.
Long story... long?

Bio mother was weird from the beginning when I came out at transmasc, would make off handed comments and get triggered and messy form simple things like requesting she use chosen name and pronouns. This went on for 1.5 years before I told her I'd be starting testosterone soon, more shitty comments and her saying she didn't want to talk about any of the 'trans' stuff at all. I sent her resources and support services to help her adjust, I believe she never accessed them. She refused to change my name or picture in her phone and had a total meltdown and stormed out of my house in January 2023. That was the last time I saw her. She avoided me for months and barely spoke to me, I reached out multiple times saying we needed to talk about what happened in January and that we needed to be on the same page about my gender and I asked her to give a timeframe of when she'd be ready to have this convo. 6 months passed. I had top surgery, it was on socials, I know she knew it had happened. I messaged a few weeks after my surgery to say she needed to let me know by the end of September (still 2023) when she would be ready to talk, because I can't just keep having her deny my existence. She went on a rant about how she's grieving, not coping, lost 'safe and common ground' with me etc and said 'you do you and I'll do me'. I snapped and told her she doesn't get to call herself a parent if she'd rather have a suicidal daughter than a happy trans son, told her she's choosing to estrange herself and that she can never come back into my life until she's done the work to come to terms with me being trans and can be supportive as I'm no longer willing to do the labour for her. She never replied and has not spoken to me since. Thankfully she never sent me any weird research into autism and gender critical stuff, I would've lost my shit.
I processed alot of grief and anger, saddness and betrayal with my therapist but ultimately realised my life is infinitely better without her.
We do not owe our parents the idea of us they have in their heads. We do not need approval from our parents to exercise our freedom and bodily autonomy. And honestly, we shouldn't seek approval from people who justify such hateful ways of treating their children.
I know going no-contact isn't for everyone! When I was still trying to salvage things with my bio mother, I found it helpful to look in strategies for going low-contact, using the grey rock method to disengage when she was being an asshole and building up my other support systems.
Sending you strength!