Are you referring to this https://www.wired.com/story/microsoft-retracts-disputed-quan... quantum computer whose breakthrough was retracted?

I don't believe it. The state of the art in quantum computing is far from it. In fact, we are not even sure if it is possible at all due to the extremely low temperatures required for a significant number of entangled qubits.

In general, secret tech is only more advanced than what is available in the open when it has no real application outside defense. But a lot of people want quantum computers more simple than the ones that can crack RSA, and they don't have them. So I find it unlikely that any nation state has a quantum computer able to break current crypto.

The focus on post-quantum cryptography is mostly preventive.