I have never found a trading platform method (margin trading), without using KYC, although, there are. even then it must be asked what securities or brokerage methods they use for customers who want to make loans.

OP, lately I've seen on this forum a trading platform that uses securities method services for customers in the form of crypto and USDT loans on the platform: https://m.mexc.com/, you can find their campaign here: https://bitcointalk.org/index.php?topic=5379290.0, If you want to try, just ask the campaign manager or the mexc telegram platform, later you can find a lot of info there about mexc.