It’s not about control logic as supercomputers are used to simulate explosions so you don’t have to do it in the world releasing a lot of radioactivity.
But you can not put a tzar bomb on a rocket, that can be fired from a silo or even from a submarine. And to threat America and Europe your rocket need to flight 10000 miles or more and reach Mach 5 or even faster. All possible only with high yield, compact warheads, which the Chinese do not have yet.
Sure, so that takes you into 80s technology. A Nintendo switch destroys a cray y-mp on perf.
The processing power at oak ridge et al AFAIK is spent trying to recover old warheads without testing them, which is a massively harder problem.
Edit: and the Chinese have had their DD-ZF publicly for years now. I feel like they have to have warheads for it. Given where we've known about what warheads they have when, it'd make sense for that to be available currently.
