I could sound dumb but what the fuck is an RBTC and how does it have the same value as BTC?

Is it not like any other Altcoin but just forked off bitcoin's network?
I don't the exact wording but its like tokenized thing, like wrapped btc (kinda?) on eth blockchain and can be traded to some uniswap exchanges. Don't know also how it has almost the same value of btc.
I still don't understand why the hell they enabled depositing RBTC if they don't plan to let people trade in the near future. I mean its one thing to enable deposits few days ahead of trading, but this is something completely different and doesn't make absolutely no sense to me.
Obviously, to lure users and trap them like what OP experienced. Good thing it's now solved.