Extremely not-fun fact: collectively, humanity currently produces more than enough food for every person. But a huge part of it is either wasted or inaccessible by people that need them, which usually results in them not going to anyone and being wasted, which is why we still have food scarcity.
Not easily, nor safely. Most food waste is from retail and Healthcare. It’s very hard to repurpose that already consumed scrap for others to eat. Let alone ship it across the world.