You can follow what is posted above already, if you do not need kyc exchanges, you will have to go for decentralized exchanges like localcryptos, hodlhodl or bisq.
I think it's only bisq that's a fully decentralized peer to peer exchange
Obviously he's looking for a non KYC p2p exchange where he can buy or sell crypto for fiat so this won't be helpful
For trading and no verification like identity card, use this exchange
Kucoin
FTX
You can't trade on both exchanges using fiat minus first having to withdraw
OP, try this site. It has some non KYC p2p exchanges. The ones on top of the list are the best.
https://kycnot.me/