I use Microsoft Authenticator App, which has an option to backup secrets to OneDrive. I now use it for all services which support 2FA setup via QR code, includi

I use Microsoft Authenticator App, which has an option to backup secrets to OneDrive. I now use it for all services which support 2FA setup via QR code, including Google accounts. Previously it was Google Authenticator, which didn't seem to have a backup option.