Then you don’t have it.
vBAT never was able to be synced. Each browser had its Rewards saved to it and never could sync with other browsers or devices. The only way to “sync” balances was to be connected to a custodial partner.
Too bad you didn’t pay attention to all the announcements in the browser, on Reddit, here on Brave Community, etc. You had until the end of October to link to a custodial partner.
For example, the links below:
And of course ZebPay launched in August/September
India is Back as Supported Region for Brave Rewards in Nightly (now in Release)!
In other words, anything you had is gone.