I'm from North Carolina, and even though sweet (iced) tea is the norm here (literally every restaurant serves it) - I've never seen any kind of standardization

I'm from North Carolina, and even though sweet (iced) tea is the norm here (literally every restaurant serves it) - I've never seen any kind of standardization attempted for that either, and it does vary wildly. When I'm at at a fast-food restaurant, I can usually pour myself a little to try first, and then mix in some unsweet tea if it's overly sweet. If it's undersweetened, then I usually just toss it and get a soda. It really would be nice if you could do something similar with boba tea, but I understand that the way it's made doesn't facilitate that.