There are different exchanges actually but few of them meet the reliability requirements just like the proof of reserve, user asset security, exchange that support wide array of network. I will suggest you go for Bitget.
See it totally depends, I have visited one platform, and it is one of the best platform that gives you the complete anonymity, no sign up, no KYC at all. However, I would rather suggest it to you. You can check the super simple user interface, never been seen before. It has a section where you can see that how does it work. You can simply type in any of your browser ninja.exchange.