Thanks for your question.
You need to backup your credentials in authenticator, if ths was not done unfortunately you can only resolve this by contacting support or asking your admins/support to reset your account https://learn.microsoft.com/en-us/xandr/curate/troubleshooting-multi-factor-authentication-mfa?source=recommendations
You can reach the support team via the global support numbers here:
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola