Try your best to reconcile and listen to what they say and take it on board. Their view on you as a mother might be entirely different to theirs, so you have to listen.
If after trying all avenues, don’t do as I did, I have literally wasted more than a decade either trying or praying for a miracle, until a few years ago, when I realised, she made a point of telling me, she just never ever wants me in her life. So many wasted years. It will always hurt like mad, but she’s alive and happy, so I’m grateful for that. I never think now of reconciliation and I make all my decisions for just me. It’s something I’ve never done, I’ve been a carer one way and another and never thought what I wanted, just the people I loved happy I think so I’ve had to learn to care for me. Do join the estrangement thread, all on there know how you feel.
Hopefully your estrangement might be short lived, most are.