You can see all listed coin/tokens on UNISWAP on here.
https://coinmarketcap.com/exchanges/uniswap/from CMC, we can see there are ~40 coin/tokens listed on there (5 of them don't have any volume anyway). I don't think it's scam or not, but rather about pump and dump coin/token on UNISWAP
this explains everything. however, the tokens to avoid are tokens that do not have a large volume. You only need to click on the link above, then sort it by volume, then you can see a list of coins that have the potential to scam there. although not all tokens that have no volume there is a scam, but you can do your research and shorten the time that way.