I recently found that the largest share of students in program X at my school do not need to take classes on topic ABC, even though topic ABC is considered as critical and fundamental by virtually everybody in the field. (Think of physics but no mechanics class)
In fact, I can't believe anybody would give them accreditation without making ABC a required topic.
Which makes me wonder: Are there any official criteria in the US about what a majors in X, Y, or Z must cover in the United States? Can a school just decide arbitrarily what needs to be covered in their majors? Can those criteria be seen in public?