Each centralized exchanges have their own criteria before listing cryptocurrencies. Some easily list those what we called shitcoin and some well-reputated exchanges don't easily list it until it shows some real potential or use-case.
This is why people should learn to DYOR before investing in particular crypto not just because many people are hyping it. If it is a shitcoin, early buyers could dump their holdings when that token gets listed on that exchange, some newbies who don't know anything about that coin will still bought at the top because they are hyped and thinking that it will pump more because it is newly listed.
There is no specific criteria or regulation now that exist for those exchanges to follow before listing a crypto. That is why we should only trade on top exchanges where only potential coins are listed. But as I said before to always DYOR because some memecoin/shitcoin still get listed because of its popularity.