My guess is that this operation was already being planned years ago and it was just a matter of timing to happen after ChipMixer went down.
In addition, they are very different cases and are handled by different departments of the police forces:
One involves economic crimes, with the issue of money laundering.
The other involves cybercrime, which involves hacking.
It makes no sense to mix the two things up, even though they happened a few days or weeks after the first one.