The USSR certainly is no more, but the PRC, Cuba, DPRK, Vietnam, and Laos are all socialist countries to this day, and countries like Venezuela are undergoing revolutionary change to establish socialism, such as the growing commune movement within Venezuela. Countries like Nicaragua and those in the Alliance of Sahel States aren't socialist, but they are generally more pro-social due to their anti-imperialist stance.

I disagree pretty firmly with your designation of China as "state capitalist." Markets and private property exist in China, of this there is certainly no doubt, but capitalism is not the mere existence of markets but the dominance of private property and the capitalist class. In China, the commanding heights of the economy are all publicly owned, and medium firms are largely publicly owned. Private property exists largely in secondary, rapidly developing industries as a means to harness the ability of markets to build up the productive forces.

Cheng Enfu, one of China's top economists and head of the Chinese Academy of Social Sciences, made this helpful diagram explaining the process of developing along the socialist road:

Moreover, the working classes are the ones that dominate the state in China, which was settled in 1949 via revolution. After succeeding in establishing socialism via revolution, the task is "reform revolution" according to many Chinese Marxists, gradually reforming socialism into higher and higher stages of development. Looking at the changes to China's systems in recent years under Xi Jinping, it appears fairly clear that China's long-stated plans are in fact being dutifully carried about by the CPC.

The rise of China is happening alongside the fall of the US. This is no coincidence, but in fact is interconnected. China presents a far more equitable alternative to US imperialism, and as such the global south has gradually been decoupling from the thumb of the US empire. In turn, south-south trade has developed enornously, resulting in a viable way to bypass unequal exchange, retaining the wealth of the global south within the global south, rather than siphoning it to imperialists. This undercuts the US, which is why it is more nakedly aggressive today.

All in all, socialism is rising, and capitalism is moribund.