I have done Story of the World and History Lives series combined for a 7th and 8th grade history curriculum. I love both of these and they worked well for those ages. They could even be used for high school credits which I have done for one of my kids. Currently, our high school kids are getting some history credits at a drop-off co-op.

In high school we send our kids to a second co-op where they get most of their high school credits so they don’t have as much freedom in their schedule to do as much AO. I tried a lot of AO years 7 and up books for my oldest son and it wasn’t as good of a fit for him, so I didn’t do AO as much with our second son. We have three girls next, however, and I do think they would do very well with a lot of the AO suggestions, so I am still learning with them.
Some books my kids have loved are Once and Future King, Watership Down, Ivanhoe (we have an abridged version), Whatever Happened to Justice, The Count of Monte Cristo (audio book is easier since it is so long), Pride and Prejudice, A Lantern in Her Hand, Jane Eyre, and all the original documents of famous speeches, etc.

It’s hard to say specifically what I would do in your shoes, not knowing your child as well as you do. Is she ready enough that she wants to do some readings on her own? Some kids are more motivated to learn at their own pace, although I would think this would not be the case with a child as young as second grade. What I’m guessing from what you’re saying is that the books aren’t keeping her attention long enough and she’s distracted? If that’s more like what you are seeing, I would continue doing daily readings, but keep them short and do the easiest AO selections, possibly re-doing some Year 1 or even Year 0 books, if that would interest her. (Hearing repeated stories for some kids can be beneficial to those who don’t pick up everything the first time.) Some kids are just not as into reading as others, but helping her to enjoy stories as much as possible will be the best long term strategy. I hope that helps answer your question!