This was not my experience with university education in the uk. I studied mathematics and we had perhaps two lectures of recap of the “further maths” A-level. One reason is that not all schools could provide all of this course so it wasn’t a hard requirement; another reason was to introduce consistent notation that would be used in the rest of the degree.
Similarly in the uk mathematics curriculum there are a bunch of “applied” modules and schools choose which to teach. Some students would have only done mechanics and some only statistics, for example, so the corresponding university courses would have to start at what might be already known for some students.
Probably this depends on the university, what they look for in students, and more generally the strength of the students they do get. There are a lot of university students in the uk but obviously some will be stronger than others and the distribution varies by university.
Similarly in the uk mathematics curriculum there are a bunch of “applied” modules and schools choose which to teach. Some students would have only done mechanics and some only statistics, for example, so the corresponding university courses would have to start at what might be already known for some students.
Probably this depends on the university, what they look for in students, and more generally the strength of the students they do get. There are a lot of university students in the uk but obviously some will be stronger than others and the distribution varies by university.