Note that their "officially" Christian schools are private: https://christos.greatheartsamerica.org/

So in theory their charters are more secular, but they're going to get as far up on the line as they can.

I have (a not close) relative who is sending his kid to a different charter where their whole website is about how much patriotism and flag rah rah is in the curriculum and how they adhere to traditional gender roles, but for the life of me I can't remember the name.