Endo Surgery Recovery

Hi, I would love to hear from anyone who has undergone endo surgery.
My sister recently had a laparoscopy for stage 4 endometriosis, as well as adenomyosis. In addition to this, she also got the coil fitted at the same time.
She is 3 weeks post op and is still experiencing quite severe pain, both in the incisions and period-like pain. Her surgeon said this shouldn’t be the case and that it is unusual.
As expected, this has left her feeling very worried and (once again in the endo journey) dismissed.
For anyone who has had the surgery:
Is there any reassurance you can give here? Maybe share your experience of recovery and whether you were still in struggling with the pain 3 weeks on.
I really want to show her that there are others who are going/ have gone through the same thing and that she is not alone. I hope to find community here to reassure her that everyone’s healing process is different.
Thank you in advance,
Ruby xx