yes, basically, bacterias in your mouth eat sugar and poop acid. I actually learned this in an old 80s french edutainment cartoon

if you drink sodas, the drink itself is acidic, as well as containing sugar for the bacteria in there. I've switched almsot entirely to drinking carbonated water rather than sodas, the pH level in those is barely below water.

after drinking acidic and/or sugary drinks, i flush my mouth with water