I heard that the official sour warheads soda isn't sour and at least one user on here is sad about it.
You should know that Malic Acid and Citric Acid (and also Lactic Acid, often used in sour beers) are available as concentrated food-safe powders. You can use them in mixed drinks, including turning that boring apple, grape, watermelon, or lemon-lime soda into something you really shouldn't pour down your throat. Nobody is stopping you.
For people who aren't spice-lords or sour-lords, here is a video with some more "normal" and less extreme culinary uses for acids from America's Test Kitchen on YouTube.
Invidious private version of the video link: Why Acids Are as Important as Salt | What’s Eating Dan?
Citric acid is great. You can make any fruit candy into the sour version by spritzing it with water and rolling in citric acid. Also serves as a great pantry backup for lemon if you want to make something that needs lemon but you do not have a real 🍋. Also good for adding sour to vegan dairy substitutes. Like vegan ranch using vegan mayo and spices and citric acid.