There are some few exchanges that are very strict for listing tokens because they are very careful so they don't list a coin that would end up becoming a rug pulled. For your tokens to be listed you with need to do submit some documents so they would be aware of some certain things about the token. The team would have to negotiate on the amount to pay and the quantity of tokens that would be sent to the exchange. There are more things that would be required to be submitted by the token team so that the listing platform would know how to go about listing the token.