Why not send your Ethereum or other Erc20 token to mexc exchange and then trade there to btc easily amd then Withdraw. You can deposit, trade and Withdraw without kyc. You can also use Safepal wallet to do this task without doing lengthy process to send token to Mexc, convert it to btc and then Withdraw. you can do in Safepal wallet just by clicking on swap and connect your wallet with mexc and Eth or other any token will be converted to btc without KYC. Third way to buy Wbtc and then convert it to btc using bridge but fee is high in this case so I will recommend second one.