I came to know about this exchange only after this thread was created. I was also clueless that they existed. I did some research about them and that too only using CMC data. They look legit to me, I haven't heard or read anything wrong about them. I haven't used the exchange and don't plan to as you need to pass KYC.
Possible that they have not been marketing their product unlike CoinDCX has. I remember in the year of COVID, their names were plastered all over the Indian Business news channels and they had their own crypto related segment in the daily telecast. Point to note that I was looking forward to them continuing this program but they have slowed down as far as I remember.
At least some traction in the media for crypto should be present, in my opinion.