I don't know that much about mining pools. From what I've learned, miners can easily switch between pools, so if one pool does something shady it can quickly lose its hashrate to a competitor. Mining pools are centralizing in the sense that they organize the work for the participating miners; in particular, they select the transactions going into each attempted block. However, miners clearly understand that decentralization is key to bitcoin's value proposition, and so avoid converging on too few pools.

I guess a state can require pools that are registered as companies within its jurisdiction to kyc all individual miners participating in them. I assume this is often the case anyway because a pool and its miners have a commercial relationship, with regular payments from the pool to the miners. But since the pool itself does not have that much infrastructure associated with it (unlike the large miners) it can easily move to a different jurisdiction, at least physically.