If I understand correctly, you’re saying that you were not verified with Uphold or Gemini because it disconnected and your region was not available. Is that right?
If I was right in the above, that you were Unverified, then all your BAT you were earning is stored in your browser. It is not saved on the internet or anything. So if you cleared your device and did not do a backup, then you would have lost the BAT stored on it.
As to if it’s lost forever, it all depends on your device and your luck. You might be able to use something like Recuva to see if you can recover all of your Brave folders to put on your device, but I say it depends on your luck as it may not work.
As to any BAT you had in Uphold, you should still be able to access that on Uphold’s website.