http://whirtorrgetftvz4g466sjqkegtyi35bjl4bvotfkfossunf5my4x6ad.onion/blog/anonymous-bitcoin-exchanges
Out of all of these, KuCoin seems to be the best when it comes to anonymity, however, in recent weeks there have been some allegations connected to insolvency of this exchange, so people should not hold significant amounts of capital in their KuCoin account. Or on any cryptocurrency exchange account. Then there are also some derivative options. These include exchanges such as ByBit, Phemex, Kwenta.io or Lyra.