@Joel Joy , thanks for posting in Q&A. I'm sorry to hear about your experience with the Microsoft Authenticator app. Unfortunately, based on my researching, it seems once you perform a fresh login, the previous backup is typically overwritten, and there isn't a way to retrieve the old backup.
Regarding your concern about multiple restoration points, I don't find the app currently support this feature. The backup and restore process is designed to work with a single backup point.
Your feedback about the UI design and the need for clearer notifications is very valid. It would be beneficial for users to have warnings about the consequences of a fresh login and the availability of backups. I recommend sharing this feedback in your authenticator app by clicking the menu under the left top, select send feedback and add your request.
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