Hello
Thanks for your question.
You have to contact instagram/facebook support to help reset you account.
Alternatively, you can reach out to Microsft support to help with your authenticator recovery https://support.microsoft.com/en-us/topic/customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola