To find out where you can sell your token, you must see information on the coin exchange. Selling tokens is not about the size of the exchange or the easiest. Exchanges do not exchange all types of tokens, only a few that they choose to be included in their market listings.
yeah, you say the right thing.
indeed not all tokens can be traded in several exchanges, to find out we should see from their own whitepaper or project website. each project has a preparation for entering their tokens into an exchange.
they must have written their list in the whitepaper.