I personally don't know if they ship their sirup around the world.
See the US companies trying the "built in Canada" marketing.
Probably they move a bit of their secret sauce, but rest is probably sourced locally.
So impact of tariffs on coke in Germany is mininal.
During WW2 german bottlers missed some ingredients so they've started making Fanta.
Profits move the other way through IP payments.
We can cut off the bleeding of profits by buying products with locally owned IP.
If we assume that the processed leaves sold for coca cola weight the same as unprocessed (what is very doubtful), then how much would Europe get allocated? Probably less than half. But let's say it's half.
50 tons of this special extract isnt much. That's just two shipping containers.
Also with their scale every bottle probably onlu getd some trace amount, so I wonder if cola would taste any different if it didnt include this.
Profits move the other way through IP payments at least.