In the US soda wise there is all Zevia sodas sweetened with just stevia. Reeds or Virgils zero soda sweetened with just stevia. Blue Sky sugar free sweetened with stevia and erythritol. And then they are Spindrift sparkling with only fruit at 4 carbs. Also sparkling waters with no carbs and essence of fruit, nothing artificial flavor wise in Mountain Valley, La Croix, Perrier, Polar. I'm sure there is more out there too.
Worth a try!