Binance DEX is decentralized or not?
I dont believe right now any exchange is fully decentralized. There are many exchanges trying to become decentralized one day. But to achieve that there is need a lot of developing. One of first exchanges that tried that was
https://bisq.network/ at that time named Bitsquare. They started developing before 2013. I believe they are most decentralized of all exchanges at this point of time.
Binance still has a fully control over its exchange site and it means if that was not truly decentralized exchange site. I have heard bitsquare but there was a possibility if that could be centralized too.
Some people said there was no true dex.