Stolen Phone: How do I get access to my Microsoft Authenticator backup on old device?

Question

My phone was stolen so I had to suspend my old device and get a replacement. Everything is tied to my Microsoft Authenticator app. However, when I loaded the app and logged in on my new device, it says there is a backup on my account on my old device and provides my email address, my old device name, the date it was created and the date it was last updated--3 days before I lost it. But it does not provide me with a way of reinstating that backup on my new device.

How do I get this backup of my Microsoft Authenticator app on my new device?