How should users in Mainland China migrate Authenticator keys when backup moves to Google One?

Hello Microsoft Team,

I am a user from Mainland China. I recently learned that Microsoft Authenticator is changing its backup method to Google One.

However, since Google services are blocked in Mainland China, this change will make cloud backup and migration impossible for us.

Could you please advise:

1. How should users in Mainland China handle the migration of their Authenticator keys in the future?
2. Are there any alternative local backup or export options available for us?

Thank you for your help.