Meet Rahim Mohamed. He manages a bodega in Red Hook, Brooklyn, where he stocks shelves, cleans up spills and serves sandwiches from the griddle. But he’s also a big deal on TikTok, where more than two million followers watch him come up with wild sandwich combinations for his never-ending stream of customers. Bodegas are the lifeblood of New York City, but what does it take to run one — especially when it’s famous on TikTok?