That all depends how you want to look at it. It's a fun thought experiment but extremely problematic since we're talking about the interaction of global supply chains and how other countries fair/react, which then requires countries to react, and then other countries react to that and so forth.

Could small countries grow the current plethora of fresh fruits/veg that would be technically out of season? Not at all.

Calorically adequate, yet boring, repetitive foods along with preserved? Probably.

Very, very, very few countries are at agricultural limits. Prepped and ready to go? Maybe you can argue that. A month or two of razing? They got it.

If it was a decade long issue, and be foreseeable as a decade long, I'd imagine you'd see more farming gluts of grains and easy to preserve fruits and veg. A lot of fun, exotic foods would go bye-bye. Then lots of canning. Short term, man... that's a hard call. I don't know if most countries are prepped for such shocks to the system. Some will fair better than others, but just like how Covid proved some things did better than others, don't really know until it happens. Problem would be, with huge spikes of global starvation, war is a real threat. That's going to throw some extra problems into the mix.

Meat will go up in price, but won't disappear. People like to think that animal husbandry is meaningless. Literally their poop will be black gold. Thousands upon thousands of years we relied on animal husbandry for good reason. People need to get off their vegan high horse. Meat production levels will probably maintain, maybe lower a little, but not by much. To maintain those crop production needs, because there would be a panic and lower crop rotation rates, you'll need to fertilize like hell. Depending on worldwide logistics and that country's natural resources, artificial fertilizers may not be as readily available as today. At that, the price would skyrocket due to the crazy demand and strategic stockpiling (toilet paper crazy times 100). Locally sourced fertilizers, cow/chicken/sheep/goat shit, will be more valuable and available. It's still an active industry in the USA, but small. I know there are some startups in Africa using rabbits for both meat and fertilizer production. So I assume there are plenty of places worldwide doing it. So that ramp up would not be too far off. Maybe though, the price of meat won't increase by much. If a majority of value from the animal will come from their poop, instead of meat, the meat prices might be slightly stable (still go up in a famine of course). Breed reliance would probably change. Less broilers (chickens) since you need a slightly active chicken if you're going to have them produce compost. That'll increase harvest time though as modern commercial broilers are like 8 week birds while a normal breed is like 20 weeks (depends on breed of course). Eggs would probably become a bigger staple since chickens are good at making lots of compost rather passively.

I'd bet this, pork will be the first to go up in price and by a lot. Unlike most other common livestock, a good amount of feed for pigs comes from taking food waste. They're straight up trashcans and can eat anything without worry. Chickens and ducks too depending on the farm. But you see it more in pig farmers. Famine like conditions, there would presumably be less food waste in general. Then more would be spent on pig feed, thus pork prices go up.

That and Victory Gardens will be a thing again. That'll be nice. Any home owners association or city ordinance that reframes from farming on a lawn/city limits would be told to stfu. That'll be nice too. In truth, you'll see a decent CO2 drop just because the logistics of moving food would diminish drastically. Homesteading will be a big thing again.

Generally, there are ways for people to adapt to this.