I’m 13 months past RnY. Sugar doesn’t give me the dumps, but I get the sweats and the mouth slimeys and I feel terrible. I have found that chewable vitamins (calcium chews, multi, vitamin C) and sugar free popsicles help with the sweet tooth. I can have a bite or two of baked sweets, but I usually pay for it after and tend to avoid it now. Carbs only get me in a bunch when I drink too much liquid after.
It is a good thing for me.
You’ll have to see how your body adjusts to the surgery. Everyone is different and you may lose your sweet tooth or be just fine.
Good luck!