Static DHCP hosts do not show up in hosts list

XG firewall SFOS 16.05.6 MR-6

I am trying to migrate from UTM 9 to XG.

I have many devices which do not allow me to change their IP addresses as they do not have a GUI/interface to do so. These devices acquire IP from DHCP server. To control which outbound ports they access, I have created static DHCP reservation for these devices. In UTM 9, these devices were available under hosts with static mapping and I could select their hostname from drop down list when creating firewall rules. In XG firewall, these devices do not show up under Source Networks and Devices. There is no host category as "hosts with static mapping". Is there a way to create firewall rules for such hosts?

Thanks,

Arun