I was thinking about the sparrow, it has some kind of mixing function, although I have never used it enough, so I am well versed in all its capabilities.
Sparrow was using Samourai's whirlpool. Now that Samourai is shut down, the whirlpool server is not working, and if you try to mix with Sparrow, you'll get an error. They removed it in their latest version:
https://github.com/sparrowwallet/sparrow/releases.
To be fair, I don't know what they have to seize, a code?
People. At first, they were confiscating coins sitting in mixers, and taking control over mixers, scaring people from using mixers. Now they're seizing developers who work on privacy-enhancing software, essentially scaring people from writing code that makes your coins anonymous.
If they don't have a person to seize, they cannot do anything. You can't stop decentralized software. It's everywhere and nowhere at the same time, like Bitcoin.