Diets are often very individualistic. In general a low fodmap diet is good for my Crohn’s disease when I am having problems. There are still low formal foods that are trigger foods for me. I can only say diet is still a challenge and it is a lot of trial and error. 40 years of assessing trigger foods.
My basic diet is to eat less processed foods as much as possible and limit sugar. For me eating enough protein was critical to helping me handle extra work from harder cycling. Most of my trigger foods are vegetables.
Experiment. It can often just be the quantity that is the issue.
I