We're sorry. Please check the following.
First, make sure the account shown under "Google Account" on the Backup screen is the one you created the backup with. If you are signed in with a different Google Account, tap "Sign out" and sign in again with the account you used for the backup via "Sign in with Google".
Then tap the refresh icon at the top right of the screen to load the latest status. If the backup still doesn't appear, restart the device and check again.
We apologize for the inconvenience. If it still doesn't work, please tap the "Contact Us" button at the top right of the Help screen and describe the situation in detail. Thank you.