... and yes I have used uniswap in the past and found it to be better in terms of volume and coins.
Technically the thing with uniswap like dexes is, every coin that's created on Ethereum (+ other supported chains) will be available there, only thing one needs to worry about is liquidity.
..the best way to find the exchange is to look the coin/token on CMC and check which DEX got more liquidity.
Or use dex aggregators like 1inch.