No. Biz Analyst fetches limited information from Tally to show on the mobile. We do that so that your Tally can run optimally and also the storage space on your mobile is as minimal as possible.
Since, we do not have all the data, we cannot restore your Tally data automatically.
However, since you would have all the vouchers synced to your mobile, you can manually create the entries using Biz Analyst mobile app from the point of your last backup.