Ah, she is only 8...you are in good shape then.
My kids are now 28 and 24. Like night and day.
They BOTH had open adoptions as children and have chosen, themselves, to close the connections to their birth families. They moved closer emotionally and psychologically to the adoptive family because that is who they grew up with and loved as time went on.
I am relieved that they knew their birth family as kids so they have lots of questions answered for themselves. Obviously a child needs to know basic things every person would want to know--ancestry, specific facts about their parents etc.
Elementary school can be difficult for adoptees because there is such an emphasis upon FAMILIES at that age. All the other kids look to see who picks them up, who comes to awards day, who has play dates or not, etc. ANY differences are super noticeable. So one needs to allow them to explore these issues and questions without taking any of it personally.
My daughters bio mom was only 16 when she gave birth. I always felt bad that I was 40 when my girl was born. Like she would feel sad that we were too old.
But as time went on she realized the perks that came with that. Some of her friends with very young parents had issues that we didn't have. And she began to be grateful that she had stable older parents etc.
my daughter bio mom went on to have other kids who were eventually taken by CPS. My daughter was 14 when she learned about her younger sibs going to foster care. She was relieved that it was not her but sad for her sibs.
She did have some ongoing communication with them as they all grew up. But she keeps her distance now because she says that have emotional issues and they also seem 'angry' and jealous of her--in that she had a cushy life compared to what they had. She prefers her brother she grew up with and her cousins she grew up with instead.