Postpartum rehabilitation

Hi! I could not find much information online so I wondered if any mothers in this group could share their knowledge.

After giving birth this year I was looking for some sort of postpartum rehabilitation. As many others I have diastasis recti and issues with my pelvic floor. In my home country it’s standard for women to participate in classes or do rehabilitation courses with e.g. the help of pelvic floor specialists. However, my friends, family and even the nurse at the clinic I gave birth at have told me that Japanese women do some light exercises at home without consulting specialists. What was your experience? Which type of doctor did you consult? Does national insurance cover physical therapy/rehabilitation in cases like this?

(I do not live in/near Tokyo)

Thanks!