Hi Crystal and welcome to you as well! 🙂
Again, if your daughter is 12, I wouldn’t worry. Try SCM and see how you like it. If you love it, you can give your daughter a separate history program when she hits high school or you can continue including her in the family history reads and assign her additional reading in a narrative American history book so that she can cover both. I would just focus on enjoying where your family is at right now.
I also want to comment on the remark about people thinking Charlotte Mason is not rigorous. I disagree. If you truly follow Charlotte Mason’s suggestions, your children will receive a quite rigorous education. This is a myth that is common among homeschoolers because they hear Charlotte Mason and they think “Oh, how sweet! Reading and nature walks!”
However, the more you study CM methods, the more you see that she expected a lot of her students and she assigned really difficult books as well. She had young children reading Shakespeare and Plutarch and studying Latin and French for instance.
CM methods start gently with young children and remain very organic even through the high school years but they are rigorous and effective!