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However, in the United States, the Financial Crimes Enforcement Network (FinCEN) has clarified that mixers are money transmitters under the Bank Secrecy Act (BSA), and therefore have an obligation to register with FinCEN; to develop, implement, and maintain an anti-money laundering compliance program; and to meet all applicable reporting and recordkeeping requirements. Given that increased privacy is the whole point of using a mixer, it seems unlikely that one could implement those compliance procedures and still retain its user base.
From Mixer Usage Reaches All-time Highs in 2022 – Chainalysis:
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