SIBO can always cause unforeseen issues, but "transitioning" should be smooth. A good healthy diet wouldn't be that much different from a so called "normie diet." The biggest differences are what you're not eating.
Processed foods for the most part. But more importantly seed oils, thickeners like guar gum, gellan gum, bean gum, arabic gum, xanthan gum, carrageenan, added phosphates like dicalcium phosphate, sodium phosphate, trisodium phosphate, phosphoric acid, etc. For many people citric acid will be a no go as well, also iron fortification. Vitamin fortification may cause issues with some people who are sensitive. Some people can tolerate whole milk but not low-fat milk (which is fortified).
That's literally 95% of the work right there. Anything else is minuscule at best. And would more or less be "fine tuning" to your specific tolerances. Like, for example, some people don't respond to starch well, or grains. Some people can't handle dairy. Some do better with starch than fruit, etc.