Some companies "pre-comply". I believe Wasabi wallet is an example of this. US law enforcement did not tell them anything, but they were shaken up by what happened with the Samurai guys so they shut out US users and shut down their coinjoin service.

Same thing with Phoenix wallet I believe pulling out of the US.

I agree with you, this is a fungibility attack, some companies with a more bitcoin ethos choose to follow the actual letter of the law (start9, mynode) while others like umbrel who aren't really bitcoin companies but rather I'd say great at UI and marketing are being overly compliant with what they think the government wants so they don't get in any trouble.