Issue with setup of SSL VPN using Radius (radsec) with FortiAuthenticator Cloud

Hi,

I am facing a issue when trying to setup a radius policy on Fortiauthenticator cloud for use with our fortigate ssl vpn, where it is not allowing me to set a realm with a saml assignment. The realm is created but is blank and no option to set in the radius policies. 

We are importing our users in via Entra.

Thanks