Impossible To chage ERC ATOM

Hello Guys, I bought 6 months ago ATOM on uniswap (ERC20 version). I was able to buy but now I can’t sell on uniswap. I am trying Gravity Bridge To swap my ERC20ATOM to Cosmos Chain so I can trade it back to my Binance Account, but I have only this : ATOM (Gravity Bridge/channel-281.

I can’t trade it on cosmos hub. PLEASE how do I Convert ATOM erc 20 0x8D983cb9388EaC77af0474fA441C4815500Cb7BB

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