I am NOT a lawyer. I am speaking from my personal experience and NOT advising you to do anything illegal.
https://i.imgur.com/nHt7aWX.jpg
In my state it is my right to request access AND copies of my personnel file up to 3 years past my last date of work. In my state failure to provide timely access to my personnel file carries some civil penalties. I have had a few (bad) employers that I have used this against, most willingly complied. A former employer can likely view this as a prelude to a lawsuit, but if you’ve left the job anyway…this is one thing to jam them up with even further. Let them be the one that loses a night’s sleep for a change. The most it took was a simple written request, sent via certified letter (to ensure a record of delivery for my records).
Informational only, please know your rights and exercise them properly.
https://www.nolo.com/legal-encyclopedia/free-books/employee-rights-book/chapter5-2.html