

The EEC is such an underexplored subject in the Cyberpunk universe. Member states are actually democratic (shocker, I know), votes in the European Council are allocated according to the member states’ wealth, a hundred million eddies per seat. Want to be a Merc? The European way is to go to a trade school which churn out licensed special force commandos. ESA literally rules space, even Arasaka has to bend the knee, there. Forget nukes if you try shit the EEC is going to drop a couple of asteroids on your head. Worker’s rights? Well yes your implants won’t right-out kill you if you quit your job, and the unions are probably just as capitalist as the companies, maybe reverting to a guild system (both are speculation, as said: Underexplored). Overall much more and much smaller companies, the EEC is actively working against Megacorps being a thing, though at least the Asian Megacorps have a solid position on the European market.
In our timeline it’s often forgotten how the EU started out as a trade cartel and that this stuff is still very deep in its bones, yet somehow the Cyberpunk timeline also manages to capture the fall of colonialism. The EEC is more than powerful enough to take over lots of stuff without breaking a sweat but I guess the consensus is “why should we take over Night City then we have to rule it”.
Regarding foreign policy: Canada indeed is the closest ally. NUSA relations are tense AF because Americans be jealous because NUSA politicians like to distract from their own incompetence and propagandise, USSR solid economical working arrangement (EEC can squeeze more productivity out of Eastern Europe than them and Moscow gets a cut), Asia in general, South America, Africa, generally solid relations but of course competetive, Japan, arch competitor. Also, ex-member of the EEC. Is it even possible to call Japan and Arasaka different entities.
And, yes, the EEC controls the eddie. Primary or secondary currency all over the world with the exception of the USSR.
Three days is the (generously calculated) time until civil defence will have soup kitchens up and running, and at least over here they stock three months worth of lentil stew, pea stew, and bread and more than enough diesel to keep logistics, kitchens and crucial infrastructure such as water pumps running. Heating, push come to shove, would be supplied at the gymnasium of your local school or suchlike. Recommendation is to have 7-10 days worth of stock.
But yes I’d recommend against (completely) relying on stocks that need preparation because electricity and water might fail. Canned soups and stews are good and don’t forget canned peaches or such so you can have dessert. Woodgas burners are cheap camping supplies and you’re bound to be able to find some sticks somewhere so with some water reserve you even can have your morning coffee.