@sujayrao Has it been a long time since you’ve used it? Because ever since the beginning of this year, you’ve not been able to earn BAT unless you’re connected to a custodial account. One of the notices that had been made was https://brave.com/rewards-changes/
There have been some who thought their vBAT balances went to zero, but if they went to brave://rewards-internals they were able to see there. So that’s what I’d suggest for you to check. If that’s missing, I’d ask if you happened to uninstall Brave, reformatted your device, or anything like that?
Btw, if you’ve not been seeing all the news, I also advise you to check out links below: