I think sov will have to be trading on cex exchange before they can list in cmc I think,
No, it's already there
https://coinmarketcap.com/currencies/sovryn/ with untracked status. Do not have to be a CEX to be listed in CMC, a dex that has been registered with CMC is more than enough reason to be listed there.
The API which CMC need to track SOV price and market activity is being developed. soon it'll be deployed