There's quite an excellent poll on free speech on campuses available here. [1] And by every reasonable datum students feel that free speech on campuses is dying. For instance some 65% feel that "the climate at their school or on their campus prevents some people from saying things they believe because others might find it offensive." There's a million other interesting and informative datums in the survey as well. Notably it was also held after 2020, so we get the COVID impact as well.

[1] - https://knightfoundation.org/reports/college-student-views-o...