My SIL had 3 pregnancies within 3-4 years. Yes, she had 3 under 3 when the youngest was born. All 3 were C-section deliveries. Her last one was an emergency at 7 months due to an almost placental abruption. My SIL just turned 32.
I had a c-section with my daughter then 6 mos later got pregnant with my son. He was born 1 mo early unexpectedly due to concern for uterine rupture after measuring the uterus wall at the scar site and finding it was less than 1mm thick. I was lucky but would recommend to be cautious.
I have an 11 month old and a 5 week old. Both c-sections. Turned out fine for us