In a large pitcher, layer in the sliced orange, lemon, and lime, followed by the chopped peach, apple, strawberries, grapes, and fresh mint. The pitcher should look colorful and full, with the fruit reaching close to the top.
Pour in the orange juice and chosen sweetener, then add about half of the bottle of alcohol-removed red wine. Using a wooden spoon, gently press and stir the fruit in the liquid, lightly muddling it to release some of the juices and aromatic oils without crushing it completely.
Add the remaining red wine to the pitcher and stir again to combine everything into a deep, ruby mixture. Cover the pitcher and place it in the refrigerator for at least 2 hours, or up to 24 hours, to allow the fruit to marinate and infuse the wine with its flavor.
Just before serving, top the sangria with lemon-lime seltzer, adjusting the amount to suit your preferred level of fizz and dilution. Give it a gentle stir, then pour the sangria over ice, making sure each glass gets a generous portion of fruit. Serve chilled and enjoy.