I have celiac and have been eating a gluten-free diet for the last six months. I haven't noticed any shift in symptoms related to Post-COVID syndrome, but maybe it just hasn't been long enough. I did not get diagnosed with celiac until 48 years old, perhaps my gut still has some healing to do. And if celiac isn't present, the gluten/wheat-free diet may be more helpful. So many variable to look into! Best of luck!