Do they not have remedial classes for these students? It's been more than 20 years, but back in my day, if you weren't ready for entry level classes (but still got in to university) you took remedial classes first.

The processes for delivering remedial classes no longer work at the scale required. UC San Diego published a detailed report of what's happening at their campus (https://senate.ucsd.edu/media/740347/sawg-report-on-admissio...): their remedial math placement grew from 32 students in 2020 to 921 students in 2025, 665 of whom placed into an extra-remedial course covering grade 1-8 math which had not previously been needed.