Since decentralized exchanges do not require verification, you should use the Dydx.exchange, where margin trading is available.
I don't know about margin available or not in DEX, but surely DEX doesn't require KYC. There are most trusted DEX can be used, why did you choose Dydx?
Uniswap or Pancakeswap, I think these DEXs are most famous than Dydx. Regarding margin, what I know so far, it is one of the features we can get from CEX, such as in Binance, top exchanges. Is DEX having margin as well, bro?
Yes, margin trading is available on Dydx.exchange. It is for this reason that I recommended OP to use this decentralized exchange. If you are interested in this exchange for trading, you can easily find an overview of this exchange on YouTube, or use Google search.