"Private" and "Christian" could be either good or bad. Don't take their word for it.
Trust me, from the curriculum alone I know my daughter’s private Christian school is so much better than her public.
Public: no science curriculum (they blamed it on Common Core). Horrible left wing novels assigned in English. And “A Peoples History of the US” by Howard Zinn.
Now she reads CS Lewis, is learning apologetics, and the English books are so much better. And she has an actual science textbook and will be taught “A Patriots History of the US” (the counterbalance to Zinn).
I’d rather her be 2 days a week in her Christian school than back full time in her public school (probably won’t even open to hybrid until next fall).