So, that's a pretty major issue, and the president was presumably presented with a meaningful choice on it (if he wasn't, then there are other, very serious, problems). Whereas I would seriously doubt that he even rubber-stamped the quantum computing thing; even if he did it's not something he'd have any context on, and would really have to rely on the experts. They're very, very different things.

In a parliamentary system the quantum computer thing would be signed off by a ministerial department, and might be rubber-stamped by the minister, but probably would not be attributed to the minister by the press and certainly would not be attributed to the PM. The "have weird paramilitaries attack our own civilians" thing would definitely go to the PM and would require a decision from them, and would be blamed on them.

The "[whoever] admin did whatever" thing, for every little thing the government does, with named whoever, is a peculiarity of the US system, but everywhere attributes major decisions which the executive leader signed off on to the executive leader.