Uniswap Labs sources token information and token logos from CoinGecko.
To change your token information (i.e. website link, description, etc) and logo on the Uniswap interfaces you will have to change the information on CoinGecko.
After the changes are made on CoinGecko they will reflect on the Uniswap Web app and Mobile Wallet after 48 hours.
Here is the CoinGecko Help Center where you can submit the request for updating token logos or information: CoinGecko Support Form
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