Asking cause similar case here, however, my symptoms have not gone completely despite being strictly GF for 2+ years now (my ttg iga levels are consistently below 4 units/ml).
Monash University is doing a terrific job about it, and their 'Low FODMAP Diet' is the first approach working for me in almost a decade.
I also recently got a Food intolerance IGG test and a LOT of things were marked red, however, I'm not sure I trust all food intolerance test technologies. Have to read up on this more before I start taking it super seriously (like I do with gluten).
I got the full experience: endoscopy, colonoscopy, allergies (skin tests), celiac test, lactose test, fructose test, etc.