Root cause- lack of stomach muscles?

So this gastro just told me that because I was a premature baby, my stomach muscles aren't developed properly, and she examined me and said I had no stomach muscles whatsoever. She said this would effect motility and if I worked on my stomach muscles, my gut issues would subside (she doesn't believe in SIBO though)

I have severe bloating, gas and I feel like something is stuck in my anus all the time, but I don't have any pain in my stomach. I always thought this was because I had no muscles so the bloat wasn't being pulled in. If this would help, I wouldn't leave the gym, but I'm scared it would give me pain. Any experiences/thoughts?