mom could care less about me

I've seen a lot of pwBPDs that want to manipulate their children into staying with them, that regard boundaries and individuality as betrayal, but what about moms that just don't give a fuck about you?

While living with her I experienced a lot of the common issues– splitting, gaslighting, the victim mentality, and even episodes where she'd lash out and become physically violent. But the second I cut her out she stopped caring. No attempts to reach me whatsoever.

Being NC is what's best for me but part of me is hurt that she genuinely doesn't care. There were times when she would be pushy and invasive demanding my affection but now it's as if I've never really mattered to her. Being the victim in the story she spread to our family seems more important than her own child. And judging from how she used to badmouth my estranged sister, she probably tells people she's relieved I'm no longer in her life now that I'm also estranged.

Can anybody relate? How am I supposed to cope with this feeling of abandonment?