Well yeah the bottling plants were the property of Coca-Cola before the war. After the war it would be expected that property would be returned to Coca Cola. Bottling plants are physical things that couldn’t be instantly teleported from Germany when Germany declared war on the US, so they continued to operate. The existence of Fanta proves that Coca Cola didn’t support the bottling plants in Germany, not evidence they were colluding with the Nazi government. If they were secretly supplying those bottling plants they would’ve been able to continue producing Coca Cola and Fanta wouldn’t exist.
Yes Coca Cola existed in the same time period as the Nazis. Maybe they should’ve stopped doing business with Germany earlier. But the idea that a business is going to push political ideals seems like an unreasonable expectation. There’s no clear path for a business on this other than following the law which Coca Cola did. The real question should be about why the US government didn’t impose sanctions on Germany earlier for their horrible politics. It’s really elected governments that should decide foreign policy, not private entities.