A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
You have to ask your IT Administrator to reset your MFA fro Microsoft Entra/Azure AD. Ideally it should show SMS/call option if you have configured earlier but looks like its not configured in your case so you have to ask your administrator to reset MFA.
you can send below screeenshot to you admin for the steps.