angie I am sorry that you are hurting, that is hard for you. A few suggestions for you to think about, I hope that they are helpful
1. You are desperately missing what you previously had with your grandaughter (understandably) and that appears to be making you focus on only that aspect of the problem. This is unlikely to be the way to find mutually compatible solutions for yourself, your daughter and her family
2. Looking after your grandaughter every day plus some weekends for so long, has possibly hindered your ability to build other interests and activities as part of your life. Do you need to work on that now?
3. When you were providing so much childcare what types of other interactions did you have with your daughter and her family? Meals at each others houses separate to childcare time? Family outings? Xmas's together? If you had those previously are those interactions continuing or have those also stopped as well? If they have, then why?
4. Have you told your daughter that you understand that things are different now, that childcare isn't needed etc?
5. Have you spoken about what she would like your relationship with her daughter to evolve into?
6. Have you made any suggestions about possible new dynamics in the relationship? Maybe a common interest that the two of you can share which would be beneficial to your grandaughter and to the relationship.
Examples might be:
- a shared love of baking, coming round to help you make afternoon tea for everyone, then mum and rest of family coming to enjoy it all?
- booking an adult /cooking clas with granddaughter
-a shared love of painting/ drawing/ crafts , having an afternoon to do that together
7. Those things can only happen if your daughter feels that they are beneficial to her daughter and if your relationship with your daughter is mutually respectful.
8. Focusing on your relationship with your daughter might help you with moving to a new relationship with your grandaughter and also with her family
I do empathise with the pain you are feeling about what you had with your grandaughter. Focusing on the wider issues around that, as above, might help to find a solution. Focusing on what you have "lost", tge decisions you daughter has made that have now impacted, mistakes made etc won't find new solutions, or new ways of building relationships
I truly hope that you can all work out a way forward together