Don't know what this 1.000 is supposed to mean, but Uniswap is never trading dollars anyway: they do not exist in defi. One can calculate the implied USDC/USDT

Don't know what this 1.000 is supposed to mean, but Uniswap is never trading dollars anyway: they do not exist in defi. One can calculate the implied USDC/USDT rate from that very page by pricing a swap for 1 ETH or BTC for USDT vs same for USDC. The USDT quote is similar to CEXes for dollars, and the USDC is substantially higher, aka value of 1 USDC is well below 1, on Uniswap itself.