im aware about that if UST address in terra blockchain didn't even listed on the CMC site. It seems like the team must have contacted CMC team to fix this. CMC has millions visitors everymonth and this can become a serious problem. You can also contact CMC through telegram but i rarely seen admin was active on the telegram group. https://t.me/CoinMarketCap
As far as i know there's no need for contract address in terra and from what i know if you can type UST to search it caused by UST and LUNA were CW20 tokens. https://docs.terra.money/docs/develop/dapp/smart-contracts/manage-cw20-tokens.html
From the link you sent, a contract address in Terra would look like
// token contract address
"contract": "terra1rz5chzn0g07hp5jx63srpkhv8hd7x8pss20w2e",