The surveys are taken in August I read, so potentially early enough so that students are not thinking about exams, passing, or failing.
I haven't looked at the data to know which year it is taken from (as in, which cohort), but if it includes final year students (I'd assume it does and that they'd be in a good position to comment on the degree as a whole), then August is right around when final exams are generally held, I believe. At least, this is the case at the University I attend (2020 dates: 10th-14th August).