It's not up to Memo. It's only listed if the marketcap is high enough. SMNATURALVILLAGE doesn't look like a real company to me and they only trade with themselves from what I've seen.
Token owners should just focus on building use cases for their token to build value for it. Memo is DEX and all tokens can be traded. Only top marketcap tokens are shown on mktcp page
Understand me ... it's not like that because on that capitalization page almost 90% are scams. You know well ... Let's start by having the ones with real permissions.