There are a lot of exchanges now that have community voting for listing altcoins. You can try Kucoin, Kucoin is one of a lot of popular and reputable exchanges. I believe they have community voting on what altcoins that be listed next, so I can consider this is totally free of charge, you just need to win by votes.
I don't know that Kucoin has this service, but the MEXC exchange also provides this service for new projects. By voting to list on their exchange and the participants voting, they will receive rewards in project tokens. This is also quite simple compared to today's centralized exchanges, most of which require very high fees. But let the community vote for you, your project is really a good and outstanding project. Since you have to compete with hundreds of other projects, just focus on building a good enough project, people will support your project.
really do Kucoin have voting option for listing new altcoins ? not sure but just now that I heard
this(or maybe because I am not really using kucoin that much because of High transaction fees)
But if this is true that there is a voting before the exchange list the altcoin i Will be glad voting
for some coins that I am following and some are in my pocket .