Hello and hope you are doing well.
It may not be related to the surgery. Abdominal bloating could be due to Irritable bowel syndrome, cystitis, pelvic infections and ovarian pathologies. It could also be due to fat or fluid or gas. Blood tests, ultrasonography and sometimes colonoscopy may be needed to diagnose the cause. Please consult your primary care physician for proper assessment and therapy.
Hope this helped and do keep us posted.