Huber’s Butchery, in Singapore’s upscale Dempsey Hill neighborhood, has long drawn shoppers looking for more than just cold cuts. Starting last month, the deli’s freezer section has stocked shredded chicken grown from cells in a lab, the first time anywhere in the world that cultivated meat can be bought in a store, its manufacturer said. Cultivated meat has been available at a handful of restaurants in Singapore and the U.S. for a couple of years. But the launch of Good Meat 3 — from California...