Coinmarketcap is priority while Coingecko is second option although I'm sure Coinecko will follow, regarding the volume on Biswap, the main job is with Biswap because they have to register their Excange with CoinMarketCap prepare all necessary documents including API. I suspect that Biswap has not been able to fulfill the requirements requested You can see the requirements here
https://support.coinmarketcap.com/hc/en-us/requests/new?ticket_form_id=360000493132So the problem is on Biswap I wonder why they are not fixing this, they are still untracked, their token is already tracked but their exchange is not, I like Coinbgecko better than Coinmarketcap, some of the new coins I've invested can easily get here than Coinmarket but int he case of Betfury they are not yet listed, anyway we'll still waiting for the next exchange the team will list Betfury.
Yes they haven't provided API document I don't know why, maybe it's in progress. With only 2 exchanges on Coinmarketcap BFG volume doesn't move at all, is in the range of $50k-70k per 24 hours if it's like this BFG won't get any rank in CMC even though ranking in CMC is important, some people use rankings as a benchmark for the development of crypto projects.