Hi Paul,
Check security on the role you mentioned having assigned to the FF User:
SAP_GRAC_SUPER_USER_MGMT_USER
There are certain authorizations that need to be there for the FFIDs to show up on the dashboard (GRFN_CONN & GRAC_USER). I recall having to look into this at one point, although I do not remember if it had to do with standard role.
You could do a quick test on security by assigning your FF User SAP_ALL and/or the GRC ALL roles to eliminate or validate an authorization issue.