Actually, without knowing it, you probably have had something to drink which was made from a “maize beer”. Many hard liquors are distilled from fermented corn, in other words, a maize beer. Corn is ideal for making the neutral spirits used to make vodka as well as gin and other flavored liquors, since it imparts almost no flavor of its own to the resulting alcohol. (Years ago I worked in the Lab for a while at Hiram Walker & Sons here in Peoria (at that time) and we had to test samples daily from the fermentation tanks.)
I’ve certainly had distilled maize spirits; the one that comes to mind first is bourbon. But I didn’t know of an undistilled maize beer. My pet theory is that maize beer didn’t catch on with European settlers of America because they already had distillation technology, so they went straight to whiskey with their corn.