So like Tsarist Russia? What does state capitalist mean? That the government is involved in business? Brazil?
It’s a useless term.
Tsarist Russia had feudalism, and no real nationalism. I also don't know if they were genocidal.
State capitalism is where you have capitalism, but the majority of large businesses (i.e. not the corner store) are owned/controlled by the state. This is very true in China, where the vast majority of businesses are owned, in whole or in part, by the state, and are commonly used for non-economic reasons to benefit the state (Huawei spying, for example). The companies serve as an extension of the state.
Similarly, German Fascism valued businesses and economics only as a vehicle to fund the rearmament/war effort. It was much more privatized, but still, you couldn't have countries producing civilian goods, in HOI4 parlance. These companies didn't really have a choice in what to produce.
In contrast, in America, many companies don't directly benefit/serve the state. News organizations are frequently antagonistic to it, video game companies don't really interact with it much, etc. Today, Trump could invoke the Defense Production Act, and force companies to produce needed goods, which would make us much more of a state capitalist system while that was enacted.
Why isn't this socialism and still capitalism? No labour theory of value, no worker ownership of means of production, less (but by no means no) central planning, etc. People can still become wildly rich,. and not have to hide it.