Uniswap is a very good exchange to list new token, currently uniswap is one of the best decentralized exchange, very easy for to understand and use.
Yes but if you won't be careful buying tokens there, you're likely to buy those scam tokens.
There were tokens that have been scammed on Uniswap and if you're careless and you like those type of tokens, mostly the newly launched tokens, you might not notice that you're buying a fake token.