As I understand it the 2 year conservative recovery after having a bub isn't just about healing from c-sects, it involves your whole body. EG tendons, muscles and organs making their way back to where they belong.

Obviously the more babies you have the bigger the strain on your insides but all people are different and heal in different ways and at different speeds.

I would talk to your ob as they would have the best idea about your uterus coping.
What I would be more worried about is your pelvic floor. You don't want to be carrying another pregnancy if your pelvic floor is too weak.