As can be found on the web pages of Wisconsin’s math department, there does not appear to be a recommendation for students with AP calculus scores that allow skipping calculus 1 (4 or 5 in Wisconsin’s case) to retake regular calculus 1 (Math 221). So Wisconsin does not appear to be different from many other schools in this respect.
About the closest thing to suggesting retaking regular calculus 1 after a creditable AP score can be found here:
https://math.berkeley.edu/courses/choosing/ap-exams
However, it only suggests that students with a score of 3 or 4 *may/i find it better to retake regular calculus 1 (Math 1A). This is quite different from the unconditional “always retake your AP credit” advice that seems to be common on these forums.
My suggestion is that students who are not sure can try the college’s old final exams for the courses that are allowed to be skipped to check their knowledge of the material against the college’s expectations before deciding whether to skip or retake. Examples from the same schools mentioned in this post:
https://www.library.wisc.edu/math/services/course-reserves/
https://math.berkeley.edu/courses/archives/exams
A few schools have “calculus 1” courses that are much heavier into proofs and theory, so they do not accept AP scores to place ahead of them. Indeed, they (Caltech and Harvey Mudd) expect that entering frosh have had regular high school or college calculus before arriving.