Exchanges hate CFD’s, it goes against their business model of having centralized transactions. These are all traded OTC and not on the exchange.
CFDs are mostly closed loop platforms. Which means when you take a trade, the platform is the counter party to your trade mostly. Which means there is no underlying exchange to which your orders are sent. So the platform earns, if you lose (in addition to the trading costs).
Since they aren’t regulated, they continuously try to push leverage to ensure you lose faster, and generally since the platform is incentivized to make you lose, best stay away.
CFD’s are popular in many countries as one platform can give them access to trade almost everything that moves around the world. But as you would have guessed by now, they will never be offered by the exchanges.