I have.
I would recommend not just advocating for more time, but chunking your exams.
For example, you are given 2 hours to answer 6 essays. Instead of asking for 3 hour to answer 6 essays, ask for one hour to answer 2 essays… 3 times.
This prevents you from having more time to go off on a tangent and have poor time management, it helps support a root cause of a likely challenge.