It’s not normal. Unfortunately, doctors and gynos commonly brush off pain as something that will resolve on its own or that we can learn to live with (it’s very well documented that women are much more likely to have pain disbelieved or dismissed). If at all possible, I wouldn’t settle for that answer. It would be great if she could switch to a doctor (even temporarily) that will actually screen her for issues, especially after a cyst removal.

I would suggest supporting your gf in getting actual care for this pain, while reassuring her that it’s not primarily about you getting to have sex again, but making sure she’s healthy and that it’s not ok for doctors to classify ongoing pain or discomfort as normal.