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.
If that is the case why haven't they update the data for sov to be tracked in cmc! Do you even know since when that untracked status have been there? It has some days now since the cmc guys put in that link without any update because it appears they can't track the rsk network and since sov is only trading in sovryn dapp it is difficult for them, reason why I mentioned the cex or other easy to track dex like uniswap when the bridge has been done.