The 10/22 will probably be a little big for her. I got my granddaughter a Crickett rifle and it fits her very well. After a few minutes, she was loading and cocking it all by herself. She hits what she aims at, and enjoys herself very much. Her older brother, 9, still prefers his Crickett over the 10/22. Having a rifle that fits them well makes it more enjoyable.
All three of my grandkids have both in my safe for when they are big enough. I was planning on building ARs for each of them before the current madness set in. Now it's a wait and see thing.
Here are some photos from her first trip to the range.