Public schools around me have done more than just turn a blind-eye to cheating. During COVID, one of our kids cheated in every subject, we showed the proof to the school and only one of the teachers had any consequence at all, and that was to give her a failing grade for the test we could prove she cheated on (quizzes and HW were ignored).

It was trivial to show she had plagiarized every single essay she wrote (just put any unusual sounding sentence in google with double quotes around it), and her English teacher said roughly: "Yeah, lots of kids are doing that these days, nothing we can do about it"