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.
Sovryn is not yet developing API to the its DAPPS. We didn't need check to be listed on CMC as long as sovryn has its own API and CMC can get the data from sovryn platform to the CMC. The team must be working on this. We know that CMC is the easiest way for anyone to get information about sovryn. The only answer is waiting for the team to create its own API to connect with CMC.