Uniswap or any similar cloned website were never really decentralized, so I am not surprised by this move for blocking addresses in exactly the same way like centralized exchanges are doing.
I don't know what more proof anyone needs to realize their is nothing decentralized about that, and if you dig deeper you will find more dark secrets who operates with fake dex exchange.
Only true decentralized exchange I know is Bisq, used with Bitcoin without some shady extension mask wallets like for uniswap.