Hoo boy! It was a whole thing! 😂 Short basic is that Steem basically got taken over by Justin Sun(Tron) via some very shady means and most of the community splintered off to Hive. So Hive is more technically a "fork" of Steem so since it's creation the two chains have evolved separately. You should still be able to move your coins off Steem but it definitely lost some exchange listing or services like BlockTrades. I'd perhaps look into https://steem-engine.net/
I honestly haven't followed the news to know if it's still fully up and running, haven't done anything on Steem in almost two years now, but at least at the outset they had a way to move tokens between Steem-Engine and Hive-Engine.
You could also try https://exchange.ionomy.com/en/markets/btc-steem
I used Ionomy to convert some BLURT to HIVE and I don't think they require any KYC registration and do have a STEEM market there.