It appears any report you might make about the education of the child has less to do with the child and more to do with your hatred of the mom.
I suggest you speak to an attorney in your area for additional advice.
Because this is Tennessee and in the name of the sacred cow of "Christian homeschooling" and no new taxes, we are in a race to the bottom of educational standards for the whole country. Thank God for Arkansas, Mississippi, and a few others or we'd be down there. I know exactly how frustrating this can be, I witness people around me all the time who are simply too lazy to get their children up and ready for school every day who claim to be homeschooling. there's nothing much that is done about it. Tragic, but not something you could complain about to any entity about, as someone has pointed out, there may be an "attendance officer" (used to be called a truant officer) for a county school system, but that person is way behind the eight ball and has lots of other things to worry about.