I’m so sorry, what a terrible experience for anyone to go through, let alone a 9-year-old.
We have a user called @Rhi3 who is 26 and has lost both grandparents, although her loss was a recent one. She has a post here if you’d be interested in talking to her: Multiple losses in 6 months. Help.
@JeanH also went through bereavement at a young age, losing her brother when she was 13 - she’s posted here: Feeling ashamed of my grief after brother’s death