Corona Contains no sulfites. The ingredients in a Corona Extra contain corn, hops, barley malt, yeast, ascorbic acid, and propylene glycol alginate.
Coors Light doesn’t contain any noted sulfites. The listed ingredients are water, corn, yeast, hops, and barley malt.
German beers rarely use preservatives in their brews. Thanks to the German Purity Law, beer cannot be made with additives.
Homebrewed beer won’t contain a notable amount (if any) sulfites. Hydrogen sulfide gas is sometimes produced during active fermentation, but sulfides and sulfites are not the same thing.
Most beers have less than 0.5 ppm sulfites (unless sulfites were added as a preservative).