Hi Erin,

MFA is supported through the Authentication Provider (e.g. Azure AD, ADFS) not directly through the Application. So, if the customer has enabled MFA in his Authentiation Provider and configured SSO (through OpenID Connect) within FSM, MFA will be available.

All FSM6 releases are able to use OpenID Connect protocol. See also the OIDC Implementation Guide:
 

Best regards
Roman