I'm pretty sure every CEX or even DEX will start to require people do KYC, based on where they're operating.
DEX stands for Decentralized EXchange. and based on their nature they can not ask for KYC because there is no centralized authority in there to take the KYC and check who is trading what with whom! maybe there are some weird designs calling themselves "decentralized" while they are not and then they ask for KYC but that is not what DEX is.
I've seen issues/complains like this on twitter tweeting binanace and CZ's account.
Yet, as I logged to my account I still have 2 BTC withdrawal so KYC is not yet required but maybe I'll it see soon or I'll force to do KYC since I have some fractions there.
this may be a country dependent issue. meaning if you are coming from country X, Y, Z then they force KYC on you and if you are from anywhere else they don't.