https://career.berkeley.edu/survey/survey is UCB’s post-graduation survey. You can narrow it to specific majors like physics. Note that many physics graduates go into computing and engineering jobs, although they may be “second choice” to employers compared to CS and engineering majors. Other jobs listed are also often math-intensive (e.g. data science, operations research). This suggests that out-of-major electives in those other areas can be helpful in determining interest and helping getting employment in those areas.
https://iraps.ucsc.edu/surveys/current-fds-campus-overview.html is UCSC’s post-graduation survey, but it is several years old.
https://careerservices.calpoly.edu/gsr-past is CPSLO’s post-graduation survey.