My doctor prescribed a prebiotic and probiotic for SIBO. After a period of time I went off the prebiotic and remain in the probiotic. She has a nutritionist on her staff that I’ve been working with. They both believe the Lowfodmap diet is too restrictive. I kept a food diary for a week prior to my first appointment with the nutritionist and we reviewed it. She helped narrow down foods to eliminate based on too much sugar content. The SIBO bacteria feed on sugar and the goal is to get the bacteria in the small intestine back to the lower intestine where they belong. If you’re looking for a doctor, my doc is a functional medicine doctor. You can search for one at ifm.org by state and city. It took me three tries before I found one that is fantastic. And I’ve been with her now for two years. Insurance doesn’t cover, but it’s with it or at least get tested by one and get recommendations to help you.
Best of luck!