That article is so dumb. There's really only two real choices for nuclear. China and south korea. America and France screwed up their reputation with how disastrous their own nuclear projects are going, Hinkley Point C is going down in history as one of the most expensive and delayed nuclear build out ever, the EPR is a disaster and I don't think France will ever get another foreign order for the EPR ever. The AP1000 isn't much better, it just gets a handful foreign orders because of American influence and money, it's cost and 10 year built out is just not competitive. Russia is a decent option, were it not for the War and the mountain of sanctions.
Most of the export reactors being built in the world right now are being built by Russia. They are building four in Egypt, four in Turkey, four in India, two in Bangladesh. The Russian financing conditions and lack of red tape basically can't be beat. The conflict with Ukraine thus far hasn't delayed any ongoing projects and Rosatom as a company still is not sanctioned. Although this might change once the West gets its own alternative enriched uranium supplies. The main issue is how do you get to pay the Russians. If you don't have large enough trade relations with them. Bangladesh is supposed to be allowed to pay the Russians in Yuan, but Bangladesh don't export stuff to China either, so everyone is scratching their heads trying to figure out how they will pay for the reactors. It's not like you can pay with dollars. Bangladesh mostly exports knitted clothes to the West.
The AP1000 is a much simpler design with less parts than the EPR. The EPR is a four loop design. Which means it is pretty complicated as far as nuclear reactor designs are. The AP1000 is a two loop design. The AP1000 was also supposed to be built in blocks which could be made in factories. In practice the West spent too much time not building nuclear reactors. After several decades not building anything restarting production proved difficult. So you had tons of delays and issues. The current nuclear regulatory environment in the West is also not helpful.
So yeah, only SK and China. Unlike SK, China has a much better logistic network and the financing power to help out. I think the only reason why China isn't completely dominating the market and winning orders left and right is because the Hualong one is still quite new, there's only a handful of them operating right now. As more and more of them start coming online and operating for more then a decade without issue, expect China to completely dominate the nuclear market.
SK still uses a lot of imported components. As for the Chinese reactors, the thing is don't expect the West to buy them. No one will want to be dependent on China for parts and fuel supplies. As for the third world there aren't that many countries which can afford a nuclear reactor there. In fact most countries in the third world would be much better off building coal power plants. But pressure by the West to stop building more coal capacity makes continuing to build those difficult.
I think South Africa, Brazil, Indonesia, and Vietnam are are all possible places where you could build nuclear reactors. Turkey also seems to want more of them.